Windows error 0xFFFFFFFF, -1

Setting up a Bluetooth PAN

I am trying to create a Bluetooth PAN between two devices where I can access REST based web services over the Bluetooth connection. I have had some success with various proof of concepts (both Bluetooth legacy and Bluetooth Smart) but I am having problems trying to create a Group network [...] read more

How to use etrace with a dynamic library for chronological traceing of function calls in C++?

Background: I have one big simulation tool, and I need to understand its logical behavior. In order to do that, the most of help I would get if I have the chronological order of function calls, for a minimal working example. I found many tools online, like CygProfiler and etrace. [...] read more

The program '[3984] dotnet.exe' has exited with code -2147450751 (0x80008081)

The program '[3984] dotnet.exe' has exited with code -2147450751 (0x80008081). The program '[3984] dotnet.exe: Program Trace' has exited with code 0 (0x0). The program '[2492] iisexpress.exe: Program Trace' has exited with code 0 (0x0). The program '[7352] chrome.exe: WebKit' has exited with code -1 (0xffffffff). The program '[2492] iisexpress.exe' has [...] read more

Cisco ASA Site-to-Site VPN Dropping

I have three sites, Toronto (1.1.1.1), Mississauga (2.2.2.2) and San Francisco (3.3.3.3). All three sites have ASA 5520. All the sites are connected together with two site-to-site VPN links between each other location. My issue is that the tunnel between Toronto and San Francisco is very unstable, dropping every 40 [...] read more

How to dump memory to a file in gdb (osx)? Need to rescue my work

I need to know how I can dump memory in Safari.app, to a file. I've entered gdb attach 6741 (my safari PID). Now what? I tried searching for help on gdb on google, but I couldn't find anything that told me what to do, even when searching for "how to [...] read more

RISC-V build 32-bit constants with LUI and ADDI

> LUI (load upper immediate) is used to build 32-bit constants and uses the U-type format. LUI places the U-immediate value in the top 20 bits of the destination register rd, filling in the lowest 12 bits with zeros. I found this in manual, but if I want to move [...] read more

Microsoft Service Fabric Host Service (FabricHostSvc) Hangs on Start

I've been working with Microsoft Service Fabric since November 2015 and have encountered many issues but now Service Fabric has become completely non-functional on my development machine. Uninstall/reinstall doesn't help. I was using 1.5-preview and have since tried 2.0 to no avail. The problem started when I attempted to run [...] read more

IL offsets missing when silverlight assembly is compiled in release mode

I followed these instructions to add IL offsets to Silverlight stack traces. This works great when building in DEBUG mode however our production/qa build process compiles everything using RELEASE mode which seems to loose the IL offset information. In release mode all the IL offsets end up being "0xffffffff". Using [...] read more

Strongswan (IKEv2) connection established, but no traffic routing

I've seen this sort of question posted a few times before, but so far, none of them have solved my issue. I'm trying to set up an IKEv2 VPN on my Ubuntu Server to use with my Windows Phone using Strongswan. The connection seems to be set up correctly, but [...] read more

Corrupted NTFS Drive showing multiple unallocated partitions

My external hdd with a single NTFS partition was accidentaly plugged out (kids!)... and is now corrupted. Iv tried running ntfsfix - with no luck - output below.. When I look at the disk under disk management in Windows 7 it shows up as having 5 partitions 2 of which [...] read more

SQL Server 2012 with account NT Service\MSSQLSERVER access is denied in domain

A few months ago we installed SQL Server 2012 in Windows 2008 R2 under the virtual account "NT Service\MSSQLSERVER", all good. A few days ago, one of the admins of the IT dept installed Full Text Search component to the SQL Server 2012 (the problem is he could not recall [...] read more

Disable IPv6 Loopback on Windows 7 64 Bit

I have a Windows 7 64 Bit machine, and I cannot find a way to disable the IPv6 Loopback. I looked at the article at How to disable IP version 6 or its specific components in Windows and shows how to set HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip6\Parameters\DisabledComponents to various values – but none of [...] read more

Make AppBar transparent and show background image which is set to whole screen

I have added AppBar in my flutter application. My screen already have a background image, where i don't want to set appBar color or don't want set separate background image to appBar. I want show same screen background image to appBar also. I already tried by setting appBar color as [...] read more

Solution needed for building a static IDT and GDT at assemble/compile/link time

This question is inspired by a problem many have encountered over the years, especially in x86 operating system development. Recently a related NASM question was bumped up by an edit. In that case the person was using NASM and was getting the assemble time error: > shift operator may only [...] read more

define double constant as hexadecimal?

I would like to have the closest number below 1.0 as a floating point. By reading wikipedia's article on IEEE-754 I have managed to find out that the binary representation for 1.0 is 3FF0000000000000, so the closest double value is actually 0x3FEFFFFFFFFFFFFF. The only way I know of to initialize [...] read more

FreeBSD IP aliases in different subnets and default outgoing IP address

I have a FreeBSD VPS that until recently had assigned 3 public ip addresses in a /29 subnet. When making outgoing connections, the IP address used was always the non aliased one ".20", however now I have added another block of 3 ip addresses in a different /29 subnet and [...] read more

ASA site-to-site IPSec vpn to linux ipsec-tools endpoints stops working after a random period of time

We swapped to ASA's over the weekend, and we replaced our VPN infrastructure which was previously based on openvpn and are now using IPSec between our ASA 5520's and our other sites that have linux (CentOS) routers. The VPNs connect just fine, but after a period of time the connections [...] read more

How to use "setTextColor(hexaValue)" on Kotlin for Android,

BACKGROUND In Java, I could directly change the text color of a TextView, using the standard hexa-decimal value of it: textView.setTextColor(0xffffffff); //white textView.setTextColor(0x00000000); //transparent textView.setTextColor(0xff000000); //black textView.setTextColor(0xff0000ff); //blue //etc... Very easy... THE PROBLEM On Kotlin, if I try to write such a thing, I get with a weird build error: [...] read more

JavaScript: convert a 52-bit integer to 20-bit and 32-bit integers

In other languages which can represent 64-bit integers, it is possible to do this very easily... How to store a 64 bit integer in two 32 bit integers and convert back again How to store a 64 bit integer in two 32 bit integers in Ruby // convert 64-bit n [...] read more

Enable TLS 1.2 in Windows Server 2012 running Exchange 2013 via IIS 8.0

I got some issues getting the TLS 1.2 protocol running on one of our Windows Server 2012 machines. I checked this using ssllabs.com by Qualys and also tested with a powershell script and the linux tool "cipherscan". The server hosts one Exchange 2013 SP1 (CU4) Server, with IIS 8.0. The [...] read more

OpenVPN connection works but no gateway is assigned

i try to setup openvpn on a vps and I'm able to establish a connection to the server, but the gateway isn't assigned to the client. Here are my config files: client config: client dev tun proto udp remote foo.bar 1194 resolv-retry infinite nobind persist-key persist-tun ca ca.crt cert client1.crt [...] read more

Walking the NTFS Change Journal on Windows 10

I'm trying to read the NTFS Change Journal but I've noticed that all the example code I can find fails on Windows 10, even though it works on Windows 7. For example, Microsofts own example Walking a Buffer of Change Journal Records works on Windows 7 but when I run [...] read more

Proper nuclear fission simulation in C++

I'm trying to simulate atomic fission in C++. Fissile nuclides have known probabilities to produce certain atomic numbers and mass numbers as fission products, such distributions are called fission products yield. I know mass product and atomic product fission yields of uranium-235 (available here). A fission product yield distribution adds [...] read more

How should the [u]int_fastN_t types be defined for x86_64, with or without the x32 ABI?

The x32 ABI specifies, among other things, 32-bit pointers for code generated for the x86_64 architecture. It combines the advantages of the x86_64 architecture (including 64-bit CPU registers) with the reduced overhead of 32-bit pointers. The <stdint.h> header defines typedefs int_fast8_t, int_fast16_t, int_fast32_t, and int_fast64_t (and corresponding unsigned types uint_fast8_t [...] read more

How __hash__ is implemented in Python 3.2?

I want to make custom object hash-able (via pickling). I could find __hash__ algorithm for Python 2.x (see code below), but it obviously differs from hash for Python 3.2 (I wonder why?). Does anybody know how __hash__ implemented in Python 3.2? #Version: Python 3.2 def c_mul(a, b): #C type multiplication [...] read more

My two-way trust with selective auth seems to behave opposite to a one-way trust

I'm not sure why I'm the only one running into this, I think it's a larger problem with Server 2012 and RDS protocols... With 2008 machines, you can use utilize a one way trust to authenticate across domains with the TSGateway service, but with 2012 it breaks when running across [...] read more

How to limit ZFS writes on NVME SSD in RAID1 to avoid rapid disk wear?

Currently I'm running Proxmox 5.3-7 on ZFS with few idling debian virtual machines. I'm using two SSDPE2MX450G7 NVME drives in RAID 1. After 245 days of running this setup the S.M.A.R.T values are terrible. SMART/Health Information (NVMe Log 0x02, NSID 0xffffffff) Critical Warning: 0x00 Temperature: 27 Celsius Available Spare: 98% [...] read more

Block incoming traffic in bonding mode when primary interface is down

My server running on latest kernel (4.4.6) has configured a bond device (bond0) with two enslaved interfaces eth0, wlan0 with primary interface eth0. cat /proc/net/bonding/bond0 Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011) Bonding Mode: fault-tolerance (active-backup) Primary Slave: eth0 (primary_reselect always) Currently Active Slave: wlan0 MII Status: up MII [...] read more

Issue installing IE11

I've been using WSUS to roll out IE11, there's a few stranglers that IE11 will not install and I've started looking into. Here's what I've done. 1. Confirmed all prerequisite updates have been done. 2. I'm using the x64 bit package of ie11 and only using x64 servers and workstations. [...] read more

System Account Logon Failures every 30 seconds

We have two Windows 2008 R2 SP1 servers running in a SQL failover cluster. On one of them we are getting the following events in the security log every 30 seconds. The parts that are blank are actually blank. Has anyone seen similar issues, or assist in tracking down the [...] read more

How can I get FreeNAS to respond to libvirt shutdown requests

I have a KVM VM of FreeNAS 0.7.1 Shere (revision 5127) running on Ubuntu Server 10.04 and I'm unable to convince the VM to shutdown from the host virsh shutdown freenas I would expect this to send some ACPI? trigger to the VM and FreeNAS then do what it's told. [...] read more

Direct3D crashes dxdiag in 32-bit but works fine in 64-bit mode

DxDiag crashes when I open it unless I bypass Direct3D. It works fine in 64-bit mode. I have a NVIDIA GeForce GT 525M, and I've tried updating (also uninstalling, reinstalling) my drivers. I've also tried doing the same with DirectX. How can I enable Direct3D for 32-bit? I've tried enabling [...] read more

Is my mac hacked? Found weird things

I apologize for posting in length, but I thought being complete would be of more value: 20120822, my browser was not resolving a domain so I went into my terminal to check and lo-and-behold! I find these crazy commands remnant: mac-mini$ su Password: sh-3.2# sudo /Applications/TextEdit.app/Contents/MacOS/TextEdit /etc/hosts Mar 22 23:07:08 [...] read more

disabling ipv6 on windows 7 64bit

not sure what i am missing here.. every website suggests creating this reg key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip6\Parameters\DisabledComponents as DWORD and setting its value to 0xFFFFFFFF i've done this, but when i reboot, my NIC adapter still shows IPV6 enabled. since i have 64bit version, i also tried setting this value as QWORD. [...] read more

dart Arguments of a constant creation must be constant expressions

When developing app with flutter, i want to define some common styles. The code is as follows: import 'package:flutter/material.dart'; class AppStyle { static Color colorRed = const Color(0xffe04f5f); static Color colorWhite = const Color(0xffffffff); static Color colorGreen = const Color(0xff1abc9c); } Now, i want to define a new style. static [...] read more

Unexpected bitshift behavior in C

I am currently trying to extract some bits from an address called addr with a 32 bit mask called mask into another variable called result as follows int addr = 7; int x = 0; uint32_t mask = 0xFFFFFFFF; result = addr & (mask >> (32 - x)); I am [...] read more

How to limit speed for every device per MAC address in the gateway via Linux command "tc"?

I have a gateway whose OS is Linux.Assume my downlink bandwidth is 100 Mbps. I want to limit the max download speed to 1Mbps for every device which uses this gateway.In other words, if there are 100 devices, every device can get 1 Mbps bandwidth in theory.I tried doing traffic [...] read more

FreeBSD major update broke vpnc connectivity, incoming ESP traffic doesn't appear unencrypted on interfaces

I updated a FreeBSD box from 10.4 to 11.2-RELEASE-p4 recently and it seems to have broken the vpnc VPN connectivity. Here's the vpnc.conf:IPSec gateway 10.1.0.1 IPSec ID vpnuser IPSec secret su0hoh8liNgeiT8 Xauth username vpnuser Xauth password miuthei3Niew2ee Nat Traversal Mode none Noninteractive Following the interface configuration; em0 is the hardware [...] read more

High Performance AWS EC2 / RDS + Nginx + PHP-FPM setup

GENERAL DESCRIPTION OF THE ISSUE We're currently running an application on a PaaS type solution for PHP. Their solution is based on AWS cloud and due to the fact that their plans don't fit our scaling needs, we've decided to migrate to AWS directly the application is performing "well" ~100ms [...] read more

How to debug ip xfrm rules

I created ip xfrm rules on 2 machine and trying to pass traffic through the ipsec tunnel. The packet comes into the other end, encrypted, and disappears. I traced them through iptables, and here is the trace. 2015-11-27T14:50:21.442638+04:30 cfae kernel: [70234.667488] TRACE: raw:PREROUTING:policy:2 IN=eth0 OUT= MAC=00:0c:29:b7:97:49:00:0c:29:42:5b:e1:08:00 SRC=172.24.1.178 DST=10.60.60.31 LEN=128 TOS=0x00 [...] read more

Same hardware/software, significant difference in performance

Introduction I have two sets of machines, set A and set B, with apparently the same hardware/software configuration, but with a significant difference in performance. Machines in set B are up to x4 faster than machines in set A. However, if I reboot a machine in set A, inexplicably it [...] read more

Iptables u32 matching nat

I'm currently setting up IPtables to redirect certain UDP payloads to my application. Here is an example of what I have working so far: iptables -t nat -I PREROUTING -p udp -d {IPDST} --dport 27055 -m u32 --u32 '0>>22&0x3C@8=0xFFFFFFFF && 0>>22&0x3C@12=0x54536F75 && 0>>22&0x3C@16=0x72636520 && 0>>22&0x3C@20=0x456E6769 && 0>>22&0x3C@24=0x6E652051 && 0>>22&0x3C@28=0x75657279' -j [...] read more

CentOS reporting lower total memory compared others in AWS

I have a t2.medium instance running in AWS on the CentOS 7 AMI and I noticed in top and free it's basically reporting 3.45GiB of total memory. If I launch an instance with the AWS linux (I think I tried the RedHat one too) it reports about 4GiB of memory. [...] read more

Windows 2008 R2 services not working

EDIT I spawned the Windows events logging service won't start issue to a separate question here I have a strange problem: 1. SQLAGENT won't start 2. Windows events logging service won't start Today I tried to copy a db to test some changes, and discovered that SQL server agent can't [...] read more

Setting up gateway on different subnet than IP address

My provider has a (stupid) setup where the IP address for the gateway is on a totally different IP range than the assigned IP address. They insist on doing this for whatever reason. I'm trying to get Windows Server 2012 R2 configured using a static route but have had no [...] read more

Packets not entering FORWARD chain

first of all, this is not an every-day routing issue. The setup is fairly complex, so let me state it before. I got a router with, lets keep it simple, 3 interfaces. eth0, eth1, eth2. eth2 is used for pppoe. eth0 & eth1 have the clients. Okay so far so [...] read more

HP P410 ADU (hpacucli) generates empty report

I'm trying to monitor hard drive's smart status. I've tried smartctl tools and HP's own hpacucli to generate ADU report. However, neither of them are useful. smartctl does not show values like Power On Hours or Hard drive temperature. ADU report shows them empty. What's the right way to monitor [...] read more

Linux port based routing : reponse packets discarded

I would like to use port-based routing on my Linux local gateway. Here is my network diagram : 192.168.42.148/24 192.168.42.1/24 192.168.44.2 192.168.44.1 +--------------------+ +----------------------------+ +----------+ | Workstation (eth0)-|----------------|-(em0) Local_GW (tun0)-|------------| VPN_GW | +--------------------+ | (rl0) | +----------+ +-------------|--------------+ 10.133.8.79/21 | | 10.133.15.254/21 | +--------------------+ | Provider_GW | +--------------------+ Provider_GW only [...] read more

iptables NAT with multiple interfaces

I have an ubuntu 10 machine I'm trying to set up with NAT. eth0 is the WAN interface, that uses DHCP. eth1, eth2, eth3 are LAN interfaces. They are connected to 192.168.0.50, .51, .52 respectively. NAT through eth1 works great. On eth2/3, I get nothing -- "no route to host" [...] read more

Black screen while installing Debian

I tried installing Debian with a netinstall CD-ROM on my custom-built PC. Everything is going fine until I choose any of the install options because then the screen turns black and I get no graphical feedback at all. The screen itself seems to get information though because it doesn't go [...] read more

firewall-cmd - add-forward-port don't work

I have a KVM server (host) with multiple virtual machines (guests). My goal is my host forward port 222 to port 22 of a guest running an ssh service. This works... iptables -I OUTPUT -d 0.0.0.0/0 -j ACCEPT iptables -I FORWARD -d 0.0.0.0/0 -j ACCEPT iptables -I INPUT -d 0.0.0.0/0 [...] read more

Error installing IE11 - prerequisite update KB2834140

I'm trying to upgrade Internet Explorer my Windows 7 (x64) development VM from IE8 to IE11. Both the online and offline installers fail with a bland error message: enter image description here [https://i.stack.imgur.com/0dueo.png] The troubleshooter tells me nothing, but the IE11_main.log reveals: 00:04.524: INFO: Download for KB2834140 initiated. Downloading http://go.microsoft.com/fwlink/?LinkID=303935 [...] read more

What does the "-->" notation mean in the output of ifconfig?

I have a VPN connection set up on my OS X machine, and when I run ifconfig in the terminal I get the following response: utun0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1500 inet 10.8.0.6 --> 10.8.0.5 netmask 0xffffffff Can someone help me understand what the --> symbol means? read more

Sysprepped image will not complete setup

I'm having a problem installing/setting up an image. Background:I've created a Windows 7 Enterprise image (i.e. installed OS, installed applications, configured settings, etc.). Then I sysprepped it and captured/applied it with imagex (onto a computer with identical hardware as the original). When I boot up the new machine, windows starts [...] read more

How to use openvpn for browsing

I'm just starting out with VPN and OpenVPN. What I understand is that I when I have a vpn connection, it's like I'm on the same network as the server. Then I should be able to connect to the server via the local address (10.8.x.x). Next to that I should [...] read more

Something very strange with network

I have Windows 7 and I have very strange thing with my network. Some time I was connected through wireless router and my IP was 192.168.2.103, router's IP was 192.168.2.1 and some other IP was 192.168.2.100. The last I get from page "active DHCP clients" of web interface of the [...] read more

Branch not taken on Linux

The below code works as expected on Windows but when built with Clang 6.0 and running on an Ubuntu server it does not work. The CurAnimIndex is an int32 and has the value 2147483647 (max int). I would expect it to enter the branch since the value of CurAnimIndex after [...] read more

GAS assembler not using 2-byte relative JMP displacement encoding (only 1-byte or 4-byte)

I am trying to write shellcode for a CTF challenge that does not allow for 0x00 bytes (it will be interpreted as a terminator). Due to restrictions in the challenge, I must do something like this: [shellcode bulk] [(0x514 - sizeof(shellcode bulk)) filler bytes] [fixed constant data to overwrite global [...] read more

pointer file randomly changes value in middle of reading raw bitmap data

I am currently working on loading a bitmap file in C. I am kind of new to C, and I ran into a problem: I have a file pointer that reads unsigned chars to a struct of rgb pixels, (it's called rgb but it reads in the order of b,g,r [...] read more

RISC-V interrupts, setting up MTIMECMP

I am trying to write a program in RISC-V assembly for HiFive1 board to wake up with timer interrupt This is my interrupt setup routine .section .text .align 2 .globl setupINTERRUPT .equ MTIMECMP, 0x2004000 setupINTERRUPT: addi sp, sp, -16 # allocate a stack frame, moves the stack up by 16 [...] read more

INT_FAST16_MAX does not reflect type size in MSVC 2010?

C99 defines int_fast16_t as an "integer types being usually fastest having at least the specified width", and Microsoft define it as a 32-bit integer in MSVC 2010: typedef char int_fast8_t; typedef int int_fast16_t; typedef int int_fast32_t; typedef unsigned char uint_fast8_t; typedef unsigned int uint_fast16_t; typedef unsigned int uint_fast32_t; Yet, Microsoft [...] read more

Why do I find some never called instructions nopl, nopw after ret or jmp in GCC compiled code?

When I compile code with gcc - (Ubuntu 7.4.0-1ubuntu1~18.04.1) 7.4.0 - I find in the compiled code some unused code lines at the end of some/all functions or after some absolute jmp. It seems the result is to align the code, but: Why don't use simply some 0s or NOPs? [...] read more

Compare two integers for equality in C++ with unknown int types

Basically what I want is something simple, a function: template<typename A, typename B> is_the_same_value(A a, B b) { // return true if A is the same value as B } This seemingly simple question is is hard as using return a == b fails for int/unsigned mix, e.g. is_the_same_value(-1, 0xffffffff) [...] read more

Static member used as default parameter leads to unresolved externals

I have a confusing issue using a static member variable as a default parameter. Since the same language construct works in a different place, it might be related to project (DLL) inter-dependencies. So please accept my apologies if my example is too complex, but I should draw the whole picture [...] read more

Does JMeter fully support NTLM Authentication?

I am struggling to make JMeter to work with NTLM authentication. At the beginning I was provided with an URL and credential. When I tested the credential in Firefox and in Chrome I received the authentication popup and upon providing the credential I was authenticated. So I had created a [...] read more

How do I prepare a statement with VARBINARY in PHP PDO for MySQL?

This is the code that I'm using to try comparing to a VARBINARY using PHP PDO: $st = $pdo->prepare('SELECT * FROM `xf_ip` WHERE user_id = ? AND ip = ?;'); $st ->execute(array($new_row[':forums_id'], $hexip)); I tried prefacing it with 0x ('0x' . $hexip), as well as using bindParam: $st = $pdo->prepare('SELECT [...] read more

How to delete file from SD card with SdFat

I'm trying to delete the oldest file from an sd card with SdFat with no success I've found that function on Arduino forumsHere void deleteOldestFile(){ SdFile dirFile; SdFile file; SdFile oldestFile; dir_t dir; uint32_t oldestModified = 0xFFFFFFFF; uint32_t lastModified; if (!dirFile.open("/", O_READ)) { sd.errorHalt("open root failed"); } while (file.openNext(&dirFile, O_WRITE)) [...] read more

I am not able to set MTU size of particular interfaces(eth0 or eth1) through Netlink sockets via NETLINK_ROUTE option

I have written a program to set the MTU size of the particular interface(say eth0 or eth1) to 1100. And the Request message is send from user space using Netlink sockets via NETLINK_ROUTE option. The message is sent successfully from user space, but when i verified the ifconfig eth0, the [...] read more

How can shift left << give different results in different functions?

I have been debugging a problem in a C++ library, and found a strange difference between literal 0 and a variable set to 0 but only inside the library. If I copy the code out into my own code it works as expected. The library code is shifting a 1 [...] read more

What's the largest possible Logical Cluster Number (LCN) on an NTFS volume?

By spec, NTFS partitions can have up to 263 - 1 logical clusters. But when I tried to calculate what size drive I'd need to test values greater than 32bits, I ran into a problem. Doing the math, a 4k cluster size with 0xFFFFFFFF + 1 clusters results in 17,592,186,044,416 [...] read more

Enable IPv6 in MariaDB in FreeBSD jail

I'm trying to set up a MariaDB 10.2 Server on a FreeBSD 11.2 Jail. The Server is running and accepts remote connections via IPv4 just fine. According to sockstat, it should also be listening on IPv6: db# sockstat | grep 3306 mysql mysqld 17516 177 tcp46 *:3306 *:* This is [...] read more

Transparent HAproxy on ubuntu (amazon EC2)

I am trying to setup a transparent HAproxy load balancer using ubuntu 18.04 on amazon EC2. I got the HAproxy to work on a non-transparent mode, so now I am trying to add the changes required for the transparent mode, but I am getting 503 Service Unavailable No server is [...] read more

How to get TOR hidden service to work with iptables

I'm running an Arch Linux server which acts as a TOR relay and I would like it to act as a hidden service as well (I want to provide .onion access to my services, I know running a relay next to a HS is not suitable for an anonymous service). [...] read more

How to fix Apache2 w/ suPHP to scan the correct .ini directory?

Apache2 was reading the correct area for php.ini in /etc/php5/apache2 until suPHP was added to the system. Configuring suPHP_ConfigPath in /etc/apache2/mods-available/suphp.conf gets the correct php.ini loaded, but does not correct the directories to be scanned. How, and where, do I fix this so that Apache loads/scans/uses PHP from the original [...] read more

OpenVPN routing between static hosts

I have an OpenVPN server with successful static-key tunnels to two separate hosts - my laptop, and another server elsewhere on the internet. I have connectivity over both OpenVPN tunnels. How do I make it so the server with two tunnels routes traffic across its tunnels? Switching to server mode [...] read more

OpenVPN client connects but can't access internet

I setup an Openvpn server on a centos box and I can get the client to connect (osx) but can't access the internet or even the local network. I thought maybe DNS but couldn't access any sites via IP. Any help would be appreciated. I will list my config files [...] read more

DHCP offer is unicast but DHCPACK is broadcast

My DHCP server broadcast DHCPACK 0xffffffff . it is not working on layer 3 dhcp relay agent . as it can not forward this broadcast message to my client. can any one help me from exactly the broadcast bit set ? should I send any parameter to dhcp server so [...] read more

nslookup fails inside freebsd jail

I posted on the freebsd forums. I've been trying all night and I've made some progress but still I can't connect to the internet from my freebsd jail. Please just give me a hint here. I get the following inside the jail if I do nslookup www.google.com : ;; connection [...] read more

How to configure an authoritative time server in Windows Server

I have a performance lab running behind a firewall, so none of the machines in the lab has internet access. All machines in the lab are part of a domain with the domain controller also present inside the lab. The problem is that some server's time are drifting heavily. Some [...] read more

on xeon, does addq require 2 clock cycles?

How many cycles are required to add long ints on a xeon? from timing trials, it appears that 2 clock ticks are needed. /proc/info says model name : Intel(R) Xeon(R) CPU X5660 @ 2.80GHz sample c code (loop.02.c) unsigned long i, j=0; for(i=0; i<(0xFFFFFFFF);i++) j+=3; assembler code 21:loop.02.c **** for(i=0; [...] read more

Windows 10 drops IKEv2 VPN connection to Cisco router in exactly 60 seconds after last data exchange

Update 3: 22 January 2017 I've narrowed down the update that causes this problem: KB3201845 OS Build 14393.479 from December 9 2016. I went through all these updates step by step. Looking at the changes files manifest, these files have been changed: * agilevpn.sys * vpnike.dll Other topics I've created: [...] read more

Windows: SSL/TLS connection reset after ClientHello (ECONNRESET / write:errno=10054)

I'm using Windows Server 2012 as a workstation. The problem is that HTTPS connection initiated by node.js randomly fails. Probably this is system-wide issue and not only node is affected, but it appears mostly with node. Because any HTTPS request can randomly fail, npm install is a lottery and for [...] read more

Network interface for VPN connection explanation

I'd like to know exactly what is happening when I create a connection with my company's VPN. When I connect (using OpenVPN), I see the following network interface by using ifconfig: utun3: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1500 inet 10.8.0.18 --> 10.8.0.17 netmask 0xffffffff This looks different from other network interfaces in that [...] read more

What can trigger a SIGPWR signal that interrupts a 'sendmsg' system call?

On a RHEL 6 host, I have a Cassandra server listening for TCP connections on localhost. In parallel, I have a client application that sends it requests. The client (C# Mono) uses sendmsg to send the serialized bytes. I consistently see the sendmsg return without having sent all requested bytes. [...] read more

How to slow down traffic with tc?

I'm on Ubuntu 14.04; I'd like to learn the basics of traffic shaping, I made a simple script that should slow down my HTTP(S) traffic to ports 80 and 443. # usage: sudo ./filename.sh #delete existing rules # wlan0 is my WiFi tc qdisc del root dev wlan0 iptables -t [...] read more

How do I configure DNS when sharing a VPN connection in linux?

I'm using a Linux computer (raspberry pi) to share a VPN connection over ethernet. I want the raspberry pi to connect to the internet normally (not over the VPN). I'm very close to getting it working, but I don't know how to configure the DNS for the eth1 network. Connection [...] read more

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People seem to be happy with second-hand Mellanox ConnectX-2s on Linux so I grabbed a pair. Both cards result in an network interface showing up on one computer but neither show up in the other computer. Working computer: * EVGA 120-LF-E650 desktop board * Ubuntu 16.04 LTS * Linux 4.4.0 [...] read more

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I have enabled TLS 1.0/1.1/1.2 protocols on my local Win7 machine and 2012R2 server as well as disabled SSL 2.0/3.0 using the registry DWord value DisabledByDefault = 0 based on the following Microsoft support article: https://support.microsoft.com/en-us/kb/245030(see SCHANNEL\Protocols subkey...) But i noticed another TechNet article which seems to contradict this KB [...] read more

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Introduction I'm trying to set up a VPN on my router so that I have two routing tables. I want it so that all the filtering is done with iptables, and iproute just acts on the specific fwmarks, ie generic rules. It is an improvement of Routing a particular subnet [...] read more

OS X - GPU Panic

For half a year, I've been experiencing random freezes/reboots on my MacBook Pro Retina Mid 2012 model. My current OS is OS X Yosemite, but I started experiencing the issue in the Mavericks era. The laptop has endured some occasional, unintended slight physical abuse, but nothing very serious. Just mentioning [...] read more

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I have a Macbook with Mac OS X 10.4.11 here, with an annoying problem. After starting the computer and logging in, the finder keeps stealing focus. You can go back to your working app, but a minute later, it steals focus again. Even as I'm typing this message, I had [...] read more

Computer tends to BSOD crash (in any browser) when using Flash based apps?

About a month ago my computer started experiencing crashes, at first it was just every once in a while, then it escalated to around 5 times a day. Typically it crashes when I access flash-based games and videos, but it has occurred at random, e.g. no sensible correlation between what [...] read more

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Both my debug and release flutter apps crash milliseconds after starting, the debug worked fine before i attempted to release the app.i changed most of the items in the gradle files as required by the production process such as changing the package names from 'com.example.*' .When i open the project [...] read more

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I am very new to firebase and I am unable to fetch the content of the key value. I tried out few things but all were unsuccessful. Can anyone help me out in fetching the data please? My firebase database - Firebase Database Structure: enter image description here [https://i.stack.imgur.com/b9LzG.png] My [...] read more

Compiler optimization causing strange behavior with bit-wise shifts

Disclaimer, this is about shift overflows which I know gives undefined behavior; so this really shouldn't be a question. The reason I am asking this is for my curiosity. Here is my code. test.c: #include <stdio.h> void func(int val) { int allOnes = 0xffffffff; printf("0x%x << 32 = 0x%x\n", allOnes, [...] read more

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I am getting the csrf token and printing the response data in console but how to keep user logged in using the response data.I am making login using the status code i.e., if status code is 200 then move to login after that I want to keep user logged in [...] read more

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This application is created 1) Console Application 2) InjectedDLL - DLL Project for inject into the process 1) the console application i have taken notepad.exe process id and inject my DLL into the notepad. 2) I have Created one exported method in the injected dll. 3) Now after injecting dll [...] read more

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I have application packagename com.wikitude.fluttersamples As for release build flutter clean flutter build apk adb install build/app/outputs/apk/release/app-release.apk It works well. As for debug build flutter run -d R -v it stuck in [ ] Waiting for observatory port to be available... [ +3 ms] Built build/app/outputs/apk/debug/app-debug.apk. [ +2 ms] executing: [...] read more

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My desire is to communicate with an Arduino Uno over an USB-port (COM3 - 9600,N,8,1). I was going to manage the information with Autohotkey on a computer running Windows 10. This test is only intended to read the information from the Arduino. But later I also want to be able [...] read more

why qspi with stm32l476 write wrong?

i've a homemade board with stm32l476 and w25q128jv qspi. I always use this QSPI with other stm32. I try this qspi and my software with stm32h7 and stm32f7 and all works fine, but i don't understand why with stm32l476 not work. The pins that i use are: GPIOE_10 --> QUADSPI_CLK [...] read more

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I see Index out of bounds exception using the signature component in two different scenarios based on the log. Is this is a known issue. Code: SignatureComponent signC = new SignatureComponent(); signC.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { Image sourceImage = sign.getSignatureImage().scaledSmallerRatio(300, 100); Image mute = Image.createImage(sourceImage.getWidth(), sourceImage.getHeight(), [...] read more

Assembly - Carry Flag when negative minus negative

If the CPU treats the subtraction as add like this question. Then (-1) - (-2) should be FF...FF + 00...02, and the CARRY FLAG should be set. I wrote c code to test (-1) - (-2) on linux, but found the CARRY FLAG was not set. How CPU deal with [...] read more

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I am in the process of learning how to use z3 (I would like to use it during CTF challenges) and have hit a point where I am starting to agree with my wife's favorite saying "I need help" :) and I am posting here in the hopes that someone [...] read more

What does arm crc32w do?

Seems like a dumb question, but the value it returns is not what I'm expecting... I need to emulate the crc32w instrcution on an arm7 chip (which doesn't support this instruction), so I need a c implementation that gets the same result. Everything I've tried differs. According to the documentation [...] read more

IIS Site breaks after disabling SSLv3

I am trying to disable SSLv3 on a 2008 R2 web server that runs IIS 7.5 but as soon as I disable SSLv3 and reboot, the website is no longer reachable. I ran a packet capture with SSLv3 still enabled and my client is establishing a TLS 1.2 connection so [...] read more

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I am trying to connect multiple Amazon VPCs (across regions) together using OpenSWAN and Amazon VGW's. The router instance can ping to hosts in both VPCs, and traffic is attempting to cross the router, but is getting dropped. EDIT: I see the counter XfrmInNoPols incrementing when the pings are not [...] read more

Hyper-V Core Server 2019 ignoring power plan thresholds

I am attempting to tweak Hyper-V Core Server 2019 (host) power thresholds, however my attempts have failed so far. Scenario The newly created Hyper-V 2019 Server (part of Workgroup, not yet a Domain) has been attached to an external UPS. Battery status is provided through a USB cable. The UPS [...] read more

Windows Task Scheduler claims successful execution despite return code of -1 (0xffffffff, 4294967295)

Having a very strange case here, where a windows task scheduler job executes a C# console application at a specific time, that returns -1 in case of an error. The job is configured to rerun itself if an error occurs. The console app fails and returns the error code. The [...] read more

Enabling TLS 1.1/1.2 on Windows Server 2008 SP2 still not possible

first for those of you, who might think, this question has been asked so many time before so it is a useless duplicate... 1. I cannot (yet) comment on other questions, so my only option on this is to ask new question. 2. I've searched and read the following articles [...] read more

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I've been trying to update the Patches which is failing continuously enter image description here [https://i.stack.imgur.com/PDkYQ.png] When I click the Failed to Install, I popped with the below description > 2018-08 Cumulative Update for Windows Server 2016 for x64-based Systems (KB4343887) A security issue has been identified in a Microsoft [...] read more

Amazon RDS SQL Server Express 2012 - Fail to log-in

I recently created a new RDS of SQL Server Express 2012. I have set the security to be publicly available and to accept all ports and incoming connections. From some reason, I fail to connect it using my three clients: - HeidiSQL - SQL Server Management Studio - java client [...] read more

shape dropbox on linux router with tc and iptables

Another machine on my LAN is uploading to Dropbox and saturating my internet connection's upload bandwidth. When that happens my pings to 8.8.8.8 take 3000-6000ms. When dropbox is not uploading my pings to 8.8.8.8 are 45ms. I'm trying to simply slow down and de-prioritize forwarded traffic to/from Dropbox on my [...] read more

Ubuntu: updated mainline kernel, now drops to initramfs

I attempted to upgrade our system's mainline kernel and am now dropping into initramfs. < update>: The commands I used were: apt-get update apt-get upgrade apt-cache search linux-image //grabbed last entry apt-get install linux-image-4.4.0-67-generic < /update> I have researched the topic and found that I should be able to access [...] read more

Kerberos Failure Audit Event Id 4769 on Domain Controller

I have an average of 17-18 failure audit events per hour recorded in the Security event log of a Windows 2012R2 domain controller, related to attempts of a Windows 2008R2 member server to obtain a Kerberos service ticket A Kerberos service ticket was requested. Account Information: Account Name: TORPDC01$@ACME.COM Account [...] read more

iptables SNAT not honoring original port intermittently

I have a mark/mangle/SNAT setup that has been working great for years. However, when trying to use this same setup for DHCP requests, it intermittently fails: *mangle -A OUTPUT -p udp -m udp --dport 67 -j MARK --set-xmark 0x7/0xffffffff #... *nat -A POSTROUTING -m mark --mark 0x7 -j SNAT --to-source [...] read more

"Service Unavailable" on fresh installation of OS and IIS 6 no matter what I try

I recently installed Windows Server 2003 on a virtual machine and then added the IIS role. (The reason for using an old OS is to make some old software work - Crystal Reports web server component) I have not yet added any pages/apps to the website (except one very simple [...] read more

Can't connect to AWS instance after import with stock Centos7

I am trying to import a Centos7 based VM into Amazon AWS. The VM was created with the Centos7 minimal ISO installed into VirtualBox. Networking in the VM works fine locally before trying to do the import. I am using the EC2 command line tools to do the import: ec2-import-instance [...] read more

Out of 2 VMs and their 1 host, only 2 at a time are reachable from the LAN

I have a VMware vSphere hypervisor set up with two VMs. I need to be able to reach the host (for configuration, etc.) as well as both VM's from my client (which is also in the same subnet). I want to set up a PoC Hadoop cluster, and the client [...] read more

Windows Server 2003: Backup Failed

I am having trouble backing up my server. I back up to an external hard drive, and up until now, I haven't had any problems with it. But today my backup failed. Here is the report from the backup log: Backup Status Operation: Backup Active backup destination: File Media name: [...] read more

Policy routing local user's traffic down a tunnel

I've got a Linux based Firewall/Router running iptables and SNAT for traffic passing through it to the Internet via a single uplink - This is working fine. There is also a small number of applications running on this server which also work fine. I've also got an OpenVPN client running [...] read more

How to debug intermitent network outage on Citrix XenServer

I have two Citrix XenServers in a pool. Both have a NIC for Management, a NIC for the SAN and a NIC for the VMs to connect to the network. The NIC for the VMs (eth3) has multiple networks configured for the VMs with different VLAN IDs. This has been [...] read more

Freebsd, ipfw sched - config type = QFQ get frozen

I have some freebsd soft-router $uname -r 8.2-STABLE code for ipfw: pipe 50 config bw 70Mbit/s sched 50 config type QFQ queue 502 config sched 50 weight 1 mask dst-ip 0xffffffff queue 501 config sched 50 weight 9 mask dst-ip 0xffffffff add 01501 queue 502 ip from 10.32.0.0/14 to 10.32.0.0/14 [...] read more

OpenVPN Network Unreachable

I'm working to set-up a VPN access to a group of virtual machines at Linode., the topology looks something like this: db.example.com LAN: (eth0:0) 192.168.154.127/255.255.128.0 utility.example.com LAN: (eth0:0) 192.168.164.229/255.255.128.0 And, more servers on the LAN with addresses in the same range. The utility server is hosting the OpenVPN Here's my [...] read more

Apache22 on FreeBSD - Starts, does not respond to requests

I'm running Apache 2.2.17 with the peruser MPM on FreeBSD 8.2-RC1 on Amazon's EC2 (so it's XEN). It was installed from ports. My problem is that, although Apache is running, listening for, and accepting connections, it doesn't actually respond to any or show them in the log at all. If [...] read more

MDADM Array Being Limited to 2.0TB

I have an MDADM array with four 1TB disks in a RAID5 configuration. Here's the relevant part of mdadm --detail /dev/md1: Version : 00.90 Raid Level : raid5 Array Size : 2929537920 (2793.83 GiB 2999.85 GB) Used Dev Size : 976512640 (931.28 GiB 999.95 GB) Raid Devices : 4 Total [...] read more

Why is it necessary to set a netmask of 255.255.255.255 for “alias” addresses in FreeBSD?

From FreeBSD handbook on the topic of virtual hosts: > For a given interface, there must be one address which correctly represents the network's netmask. Any other addresses which fall within this network must have a netmask of all 1s (expressed as either 255.255.255.255 or 0xffffffff). Can anybody explain why [...] read more

Debian not detecting NVMe, ASUS Zenbook UX430UA

I'm trying to set up a Win 10 / Debian 10 dual boot on an Asus UX430UA that I've just bought new. I replaced the OEM SATA SSD with a larger NVMe SSD (ADATA XPG SX8200) and am trying to install both OS's on the same SSD, as I've done [...] read more

Failed MacbookAir boot Linux (Tails) - Kernel panic on boot

I’ve an error with my MacBook Air (Retina, 13-inch, 2018), version 10.15.1 Boot ROM version : 1037.40.124.0.0 (iBridge: 17.16.11081.0.0,0) I try to boot on Tails by a USB key and Apple adaptator Thunderbotl/USB See the log after select Tails boot : (AE_ALREADY_EXISTS) (20190703/psparse-529 [ 0.772994] ACPI Error: Aborting method \_PR.CPU0._PDC [...] read more

php and zendguard with asterisk / freepbx

Im running freepbx version 13 and started to upgrade to version 14. System is on a CentOS 6 system. The system required certain upgrades first including php which I've upgraded to 5.6.40 and installed zenguardloader 2.6.0 I'm assuming there is some sort of incompatibility between php and zenguardloader as I [...] read more

Find cause of BSOD

Recently, I started getting BSODs a few times a week. I have a hunch that they are related to the display driver/docking station (I'm using IBM T480) because they seem to happen around the time I connect/disconnect to the docking station and more importantly, I don't actually see the BSOD, [...] read more

Missing memory in linux ubuntu 16.04 system

I've been struggling with this problem for quite some time and am completely out of ideas. I have 8GB memory installed, but ubuntu sees only 3.2 GB. Hardware: Mother Board Information Intel DG965SS Processor Information Socket Designation: LGA 775 Type: Central Processor Family: Core 2 Manufacturer: Intel(R) Corporation ID: F6 [...] read more

The system time interval between Arm and Ubuntu

Problem Description: With Arm machine as a Server, with Ubuntu as a Client, Server via the Client send time package to sync that time, after synced time, Comparing their time, I found that with a continuation of the time, the time difference is bigger and bigger, I suspect that may [...] read more

Codec and setting for lowest bitrate ffmpeg output

I need to convert my input audio file to the lowest possible size to transfer it over a radio transmitter. Now with the AAC codec and MP3 format I used 8kbps for bit rate, 16 kHz for sampling rate and 1 channel, and my output data is about 3kb per [...] read more

SOME/IP length error in trace window when sending SOME/IP messages from CANOE using CAPL script

I am getting SOME/IP length error(but getting correct data) in trace window when sending SOME/IP messages from CANOE using CAPL script. I think i am missing any settings that should be done in Canoe. Can anyone suggest a possible reason for this? and how to solve this? The code used [...] read more

GRUB2 fails to boot multiboot compliant kernel that worked with GRUB Legacy

I have been trying to port a non-Linux mostly multiboot 0.6.96 compliant (the multiboot header is past 8 KiB) 32-bit elf kernel from GRUB Legacy to GRUB2. Currently, the kernel and GRUB are placed on a USB which is used to boot a different computer via the BIOS, like a [...] read more

Error 582 while trying to access Windows Features

Today went to turn on the Hyper-V feature in the "Turn Windows Features On and Off" settings, but the dialogue would always just load for like 20 seconds then crash my machine. I looked up alternative ways to view/access the Windows Features and found you could do it from DISM [...] read more

Windows 7 OK button on Copy To dialog doesn't copy profile

So I am attempting to copy a User Profile to the default profile. I am using WinSpy++ to enable the disabled "Copy To" button - this process works on a stock laptop I have here. However, this does not work in a customised image I have with a fair amount [...] read more

How to add routing for 2 VPN connections?

I am trying to setup second VPN connection over the first one, which is my only option at the moment. The first VPN connection works fine(utun1), providing me internet access and it looks like this: Internet: Destination Gateway Flags Refs Use Netif Expire 0/1 10.56.10.5 UGSc 0 0 utun1 default [...] read more

Mount ancient PATA disk (from a 386) to restore files (ATA 1, or older)

I have a PATA disk from a 386 laptop (1995?) which I would like to get files off. It is a Seagate 9096A, and is working. Using the old laptop is not possible. I have tried a USB - 2.5" PATA adapter, but it failed to properly interface with the [...] read more

Semi-disconnected network drives Windows 10 after timeout

I'm using Windows 10 in our company for a couple of weeks. Using the GPO (I'm a domain admin myself) we added some network drives for all users of our domain. This works fine. But.... For some reason, after a while my network drives are semi-disconnected. I use the word [...] read more

Web Services for authentication over SSL failed due to TLS 1.2 on Windows Server 2012 and IIS 8

There are a SSL vulnerability called POODLE discovered by Google team in SSLv3 protocol. So uses of SSLv3 is not secure to use. Now its recommended to use TLS 1.2. We have IOS applications that are using web services over SSL for login to app. Apps started throwing error as [...] read more

linux drops packet when trying to route it - why?

I track packets using LOG targets for all chains of all tables and the last chain I see my packet in is the POSTROUTING chain of the mangle table: mangle_PREROUTING: IN=eth0 OUT= MAC=00:16:3e:0f:01:00:00:16:3e:0f:02:00:08:00 SRC=10.2.1.2 DST=10.1.1.2 LEN=84 TOS=0x00 PREC=0x00 TTL=63 ID=60912 PROTO=ICMP TYPE=0 CODE=0 ID=41230 SEQ=1 As off http://inai.de/images/nf-packet-flow.png, I expected [...] read more

Higher resolution not available Ubuntu 14.04 on ESXi host

The maximum resolution available for my Ubuntu 14.04 vm is 1360x768. However, the max resolution for my Ubuntu 16.04 is 2560x1600. Both are running on the same ESXi host with the same video card settings. Both have the latest version of VMware tools installed. The physical monitor I am accessing [...] read more

How to set up dual quadro cards on RHEL 5.5?

I have a RHEL 5 workstation with 2 nvidia Quadro FX4500 cards, with one display attached to each card. After doing a clean install of RHEL 5.5, the second display doesnt work (it worked ok in RHEL 5.2). Neither separate X screens nor Xinerama are working. The kernel version is [...] read more

Is my NVIDIA GT 540M having a hardware failure?

I'm using a Sager NP5160 laptop, which has an NVIDIA GT 540M dGPU as well as integrated graphics. I'm dual-booting Windows 7 and Linux Mint. I've recently noticed issues with games not performing as well as they should when I switch to balanced mode (from UMA mode) in Windows 7. [...] read more

Mac not setting routes on openconnect with vpnc-client

I'm trying to connect to a VPN on my Mac, but for some reason routes aren't being set, even though they seem to be set by the vpnc-client script. root@machost:/Users/username# cat .openconnect authgroup=AUTHGROUPHERE user=USERHERE script=/usr/local/bin/vpnc-script no-cert-check #background #passwd-on-stdin root@machost:/Users/username# openconnect --config=.openconnect HOSTHERE POST https://HOSTHERE/ Attempting to connect to server 1.1.1.1:443 [...] read more

What does netstat -r on OSX tell you about gateways?

I noticed the route table has a lot of entries I do not understand. The route tabel is: Internet: Destination Gateway Flags Refs Use Netif Expire default 192.168.0.254 UGSc 28 0 en1 10.8.0.1/32 10.8.0.5 UGSc 1 2 tun0 10.8.0.5 10.8.0.6 UH 2 3 tun0 127 localhost UCS 0 284 lo0 [...] read more

Packets marked by iptables only sent to the correct routing table sometimes

I am trying to route packets generated by a specific user out over a VPN. I have this configuration: $ sudo iptables -S -t nat -P PREROUTING ACCEPT -P OUTPUT ACCEPT -P POSTROUTING ACCEPT -A POSTROUTING -o tun0 -j MASQUERADE $ sudo iptables -S -t mangle -P PREROUTING ACCEPT -P [...] read more

Auto-mount all USB-devices at same USB socket to same mountpoint

* I have a small computer with 2 USB sockets : A and B. * I want any external USB disk, attached to socket A - to be mounted as " deviceA" * I want any external USB disk, attached to socket B - to be mounted as " deviceB" [...] read more

Using TC from iproute, unable to match canid

I'm trying to use tc from iproute2 to prioritize packets sent to a canbus. Before doing so I read this guide about the issue: http://rtime.felk.cvut.cz/can/socketcan-qdisc-final.pdf Even using the exact examples from that pdf, I'm not able get any of the filters to get a match. My current version of kernel [...] read more

Why did my ubuntu machine leave suspend?

Sometimes I come upstairs and my computer has left suspend and is booted or booting or whatever. Is there a log somewhere that will show what caused it to leave suspend? (ie mouse, keyboard, magic packet, power button?) This is what I see in dmesg: [191069.614821] init: anacron main process [...] read more

MFT / NTLDR / NTFS (external drive) damaged after ntfsresize (Linux)

I have had an external USB drive attached to a RaspberryPi (headless), 1.5 TB Volume, 100% partition NTFS. During this question Creating ext4 partition from console, my goal was to change the overall fs to ext4 by shrinking the ntfs partition to 50%, copy all files to the new partition [...] read more

How do I stop Spotify from crashing?

I am using Spotify on wine on Linux (Ubuntu). It worked fine before, but after I uninstalled and re-installed it, for some reason every time I run it, it doesn't work. It crashes after I log in. When it crashes I can see the Spotify window. When it crashes, Spotify [...] read more

Mac crash report info - what can I learn from it?

My Mac (MacBook Pro, 10.7.3 OS) is crashing a couple of times a day. I started this behaviour just recently, and for no apparent reason. I've done a disk check and it all seems fine. When it crashes, the screen goes black and I have to long-press the power button [...] read more

Mac crashing with black screen on XCode install + random other times

I have a Macbook Pro bought over a year ago without extended warranty. Lately it has started crashing as follows - the screen goes black. The last note of the music (if playing, radio or iTunes) loops repeatedly. It will not go into in standby when screen is closed. Power [...] read more

Kernel Panic every time I open a print queue

Every time I open any printer queue I get a kernel panic and have to reboot. It's quite frustrating. I've tried removing/adding printers, clearing all caches with Onyx, repairing permissions, all manner of things to no avail. Any tips would be greatly appreciated! ==== CRASH REPORT ==== Interval Since Last [...] read more

CLIon - can't get visual studio toolchain to work: cannot open file 'MSVCRTD.lib'

CMake Error at C:/Program Files/JetBrains/CLion 2019.1.3/bin/cmake/win/share/cmake-3.14/Modules/CMakeTestCCompiler.cmake:60 (message): The C compiler "C:/Program Files (x86)/Microsoft Visual Studio/2017/Community/VC/Tools/MSVC/14.16.27023/bin/Hostx64/x64/cl.exe" is not able to compile a simple test program. It fails with the following output: Change Dir: C:/Users/dbak/Projects/firmware/testing/cmake-build-release-visual-studio/CMakeFiles/CMakeTmp Run Build Command(s):nmake /nologo cmTC_99064\fast "C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.16.27023\bin\HostX64\x64\nmake.exe" -f CMakeFiles\cmTC_99064.dir\build.make /nologo -L CMakeFiles\cmTC_99064.dir\build Building C [...] read more

Adaptive layout in different sized devices

When using Flutter, the UI gets offset if testing on different sized devices. As you can see in the two images I posted, the first one is tested on iPhone 8 Plus, and the button is hidden under the banner ad. But in the iPhone 11 Pro max size, the [...] read more

rxjava based mjpegdecoder does not work as expected

Since i am having trouble with OpenCV's mjpeg stream handling e.g. for logitech cams I'd like to create an mjpeg stream handler using rxjava. The goal is to create an Image Observer that is fed from an mjpeg url. Please find below the current state of the code. There are [...] read more

CUDA C++ problems with CMake on CLion IDE

I'm trying to start a project with CUDA C++ using CLion as an IDE. I installed a fresh version of CUDA Developer Tools (v10.2) and tried to load the changes of the MakeFile. Apparently, the CUDA compiler (nvcc) doesn't get properly linked, but I'm not sure this is the problem. [...] read more

Can not able to read data from custom AXI peripheral register

I am working with a Zynq board where a custom AXI 4 lite slave peripheral is created and then added from the IP Repository. And created a synthesizable custom IP in vivado (which is sine wave IP)and also wrote a C code for reading this IP output ( i want [...] read more

Output of Arduino Capsense Library

i am using the CapacitiveSensor library in the Arduino software with the code: CapacitiveSensor cs_4_2 = CapacitiveSensor(4,2); // 10M resistor between pins 4 & 2, pin 2 is sensor pin, add a wire and or foil if desired CapacitiveSensor cs_4_6 = CapacitiveSensor(4,6); // 10M resistor between pins 4 & 6, [...] read more

Is there any way to convert internal storage image into android Drawable Object

I had to use this drawable object in my code. but I created those objects with my project resource images. I want to get drawable objects with internal storage images or online images. here is my sample code that I used my Drawable object public Bitmap getBitmap(int width, int height, [...] read more

Place a variable in source code and modify later the compiled binary

I currently searching the best solution to solve my "request". I use a struct in the source like: In the header: struct my_struct { unsigned int val; char *name; }; in the c files: struct my_struct variable = { .val = 0xffffffff .name = "config_variable_name", }; Now after compile I [...] read more

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I'm having trouble sorting my list of cards. Everytime I save a data, it outputs in my app as a card. It contains name, time, date, pictures and etc. The problem is it doesn't sort via time and date. It just adds and adds. It doesn't even stack, it just [...] read more

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I have searched the net and old question and have no answer that solves my issue. Fresh install of JBoss 7 1.1 final, I am trying to call EJB using JNDI. It looks like it connects OK but has an error on actual method call. Here is the Java JNDI [...] read more

flutter how to done with dragging?

I want to done todo(as container) (like in link: https://www.uplabs.com/posts/todo-app-mockup) with dragging to right. This is i did but it doesn't work. Draggable( //onDragStarted: ()=>Text("batuhan"), axis: Axis.horizontal, feedback: Container( height: height/12, width: ww, decoration: new BoxDecoration( color: Color(0x00000000).withOpacity(0.8999999761581421), borderRadius: BorderRadius.circular(6), boxShadow: [BoxShadow( color: Color(0x0f000000), offset: Offset(0,1), blurRadius: 6, spreadRadius: 0 [...] read more

How to set the size of enums to 32 bits with arm-gcc without using -fno-short-enums

I need to fix the size of enums in arm-gcc (plain C, standard 99, not C++) to 32 bits. I don't want to use -fno-short-enums because it generates a warning because of other libraries I'm linking against. I have tried __attribute__((packed)) and #pragma pack(4) and none of them work. Is [...] read more

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I am trying to show HTML with code with flutter by use flutter_html: ^0.10.4 import 'package:flutter_html/flutter_html.dart'; but scroll when showing html get yellow errorenter image description here [https://i.stack.imgur.com/R8fse.jpg] code body: Builder( builder: (BuildContext context) { return Container( child: Column( children: <Widget>[ _buildHeader(context), loading ? Container( color: Colors.white, child: Column( children: [...] read more

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I am trying to swap two variables in a thread-local context for CUDA device code. As explored here, the CUDA compiler seems to be able to infer which registers to pass along. However, will I experience warp-divergence if I were to run the following code? template <typename T> __device__ void [...] read more

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Good day 1. The problem: * I am trying to create functions that return a char array or a pointer to the array. * In the past I used String arrays and String functions, and would like to get a better control of my memory allocation. * Please see code [...] read more

How do i fixed containers in Flutter?

I want to make first container fixed in center and second container fixed in right but i couldn't. I add mainAxisAlignment: MainAxisAlignment.spaceBetween in row line but it didn't work. Is there different properties to adjust position of widgets? My Code: new Container( width: 360, height: 502, decoration: new BoxDecoration( gradient: [...] read more

arithmetic right shift shifts in 0s when MSB is 1

As an exercise I have to write the following function: multiply x by 2, saturating to Tmin / Tmax if overflow, using only bit-wise and bit-shift operations. Now this is my code: // xor MSB and 2nd MSB. if diferent, we have an overflow and SHOULD get 0xFFFFFFFF. otherwise we [...] read more

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I am working on Swift Google Maps. I cannot get the didTapMarker delegate to execute when the user taps on the marker. I put the mapView.delegate = self in the viewDidLoad method, but it did not help. import UIKit import GoogleMaps import Alamofire import ObjectMapper import SwiftyJSON class ViewController: UIViewController, [...] read more

Can eBPF's perf_submit() be used in a socket_filter program as well?

So I was trying to send some data from the kernel space program to the user space program using perf_submit. I've done some studies and here(https://github.com/iovisor/bcc/issues/2423), yonghong-song answered(the last comment) that a socket_filter program can not access bpf_perf_event_output helper and therefore it can only be used for tracing program types. [...] read more

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I'm following the Vulkan Tutorial and the section Window Surface says that on Windows a VkSurfaceKHR object is created using the following code: VkWin32SurfaceCreateInfoKHR createInfo = {}; createInfo.sType = VK_STRUCTURE_TYPE_WIN32_SURFACE_CREATE_INFO_KHR; createInfo.hwnd = glfwGetWin32Window(window); createInfo.hinstance = GetModuleHandle(nullptr); if (vkCreateWin32SurfaceKHR(instance, &createInfo, nullptr, &surface) != VK_SUCCESS) { throw std::runtime_error("failed to create window surface!"); [...] read more

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I'm creating a game engine and I'm at the point where I would want to draw wireframe shapes for debugging (colliders, triggers, raycasts, etc.). I was previously using meshes with a wireframe rasterizer state, but now I want to migrate the system over to DirectXTK's example using their PrimitiveBatch class [...] read more

Memory sharing between threads in C

can someone please explain exactly what memory is being shared between threads? I got the code from a website just so I can explain what I don't understand exactly. I want to know, if all the threads after they're created they will execute the function doSomeThing and will they share [...] read more

ImageBaseAddress in PEB is wrong

I'm currently trying to retrieve the Image Base Address of a suspended 32-bits process. I successfully retrieved the PEB VA by using (*CTX).Ebx - 0x1000 (where CTX is the CONTEXT structure retrieved with GetThreadContext()), it's in correlation with the data I got from some process analysis tools. The problem is [...] read more

How to achieve animated textStyle shadow in Flutter

I'm trying to animate the textsyle of an AnimatedDefaultTextStyle widget so that the result would have the text's shadow 'grow' for an effect of gradual elevation. Currently when the state that controls the preferred textstyle changes it just jumps between states without animating. Here's the code for the widget; AnimatedDefaultTextStyle( [...] read more

An unhandled exception of type 'System.AggregateException' occurred in Microsoft.Extensions.DependencyInjection.dll:

I migrated a asp.net core project from version 2.2 to 3.1. I have added all the dependencies and docker related components. It is compiling fine but on running the project I am getting the below mentioned error: > Exception thrown: 'System.AggregateException' in Microsoft.Extensions.DependencyInjection.dll An unhandled exception of type 'System.AggregateException' occurred [...] read more

An unhandled exception of type SeleniumWebDriverException occurred in WebDriverdll A exception with a null response was thrown using EdgeDriver

I am using Selenium in C# with the Edge driver however when I run the code I receive the following error. Using OpenQA.Selenium; using OpenQA.Selenium.Edge; class HomePageTests { static void Main(string[] args) { { { IWebDriver AzimaHome = new EdgeDriver(); AzimaHome.Navigate().GoToUrl("http:www.msn.com"); IList<IWebElement> terms = AzimaHome.FindElements(By.TagName("a")); terms.First(element => element.Text == "").Click(); [...] read more

how to return arabic translations to resource id?

I'm working on an app that contain sqlite database, the concept of the app is to enter and save data that translation part is the problem has two languages Arabic and English when the user insert new product he has to select the item type from spinner (which is translated [...] read more

what are the approaches to create exception handler?

I want to implement handler for exception , but i don't know where i can start. The reason is that my qemu log file show me a lot of exception fault : DR0=00000000 DR1=00000000 DR2=00000000 DR3=00000000 DR6=ffff0ff0 DR7=00000400 CCS=0000258d CCD=000012c6 CCO=SARL EFER=0000000000000000 check_exception old: 0xffffffff new 0xd 7581: v=0d e=9634 [...] read more

setColor not working after Android 10 (API 29) upgrade

My code paint.setColor(0xFFFFFFFF); was successfully running before upgrading to Android 10. Now it throws an error: > Wrapped java.lang.IllegalArgumentException: Invalid ID, must be in the range [0..16) (Looks like the error message is trimmed) Nevertheless, paint.setARGB(255,255,255,255); works fine. I've read that starting API 29, setColor also accepts long color values, [...] read more

from origin 'null' has been blocked by CORS policy

I want to upgrade the app from version 7 android sdk developed using phonegap to version 16 android sdk. When you call PhoneGap.JSCallback, the following error occurs: I/chromium: [INFO:CONSOLE(0)] "Access to XMLHttpRequest at 'http://127.0.0.1:42857/adbed140-2489-4bfd-94bf-319f79216d83' from origin 'null' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the [...] read more

JSCallback Error: Request failed., source: file:///android_asset/www/js/phonegap.0.9.4.js

The Android sdk 7 version of the app developed using phonegap should be updated to Android sdk 16. The following issues occur during this process: I/chromium: [INFO:CONSOLE(0)] "Access to XMLHttpRequest at 'http://127.0.0.1:46609/0fc689db-52b9-4129-b2bc-761061d1130d' from origin 'null' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.", [...] read more

Application installed but 'stop repelatedly' on Android

I am using the third-party library sample application for flutter. It works well on iPhone but on Android(real device). Being installed correctly ,but show message "stops repeatedly" Application doesn't launch. I wonder it is the problem of my Android ,flutter version or sample itself....but there is no hint on my [...] read more

Query 100Gb of S3 data in milliseconds

I have json data in s3. data looks like { "act_timestamp": 1576480759864, "action": 26, "cmd_line": "\\??\\C:\\Windows\\system32\\conhost.exe 0xffffffff", "guid": "45af94911fb911ea827300270e098ff0", "md5": "d5669294f78a7d48c318ef22d5685ba7", "name": "conhost.exe", "path": "C:\\Windows\\System32\\conhost.exe", "pid": 1968, "sha2": "6bd1f5ab9250206ab3836529299055e272ecaa35a72cbd0230cb20ff1cc30902", "proc_id": "45af94901fb911ea827300270e098ff0", "proc_name": "gcxvdf.exe" } I have around 100GB of such jsons stored in s3, in folder structure like year/month/day/hour. I [...] read more

static member variable Colors not drawing

I have a StatefulWidget State class in flutter. I have declared some static const Color member variables. When I try to use these Colors, they are not being drawn. When I take the same Color ctor, and inline it where the static member variables were used, it works. Am I [...] read more

Simple dialog on pressing Floating action button for Flutter

Im a beginner in flutter and i need some help in figuring what went wrong with my code here i am trying to make the floating action button display a simple dialog (and add content) but i am unsure why i am unable to bring the simple dialog out when [...] read more

GridView appear animation

I am new to flutter 💘 🤓 I am learning and have made this layout. Structure of the layout: App │ └── MaterialApp │ └── Scaffold │ └── AppBar │ └── TabBar │ │ │ └── Tab │ └── Container │ └── Expanded │ │ │ └── TabBarView │ │ [...] read more

is there a portable way to get a pointer for struct with virtual table through a pointer to a member of it

in my io completion ports implementation I was delivering notifications through a switch statement on an opcode in a struct inheriting from OVERLAPPED structure expecting that the OVERLAPPED base is at offset 0 from the derived one later I used a virtual method in the derived struct instead of an [...] read more

Enabling EPT in VMX causes failed entry due to guest state

I'm building a hypervisor at home and I'm having an issue with entering VMX when enabling EPT. The following code is used to set the guest mode, and it successfully enters VMX. However, when I enable EPT I'm getting a VMX entry failure with exception no. 33 (vm entry failure [...] read more

Inflate multiple views to display multiple MapFragments

I have an xml layout which includes the following code: <fragment android:id="@+id/map" android:layout_width="match_parent" android:layout_height="100dp" android:name="com.google.android.gms.maps.SupportMapFragment" /> This layout can be inflated in the main activity more than once and, in that case, should display multiple MapFragments. When that happens, however, I get the following error: Duplicate id 0x7f0a0213, tag null, [...] read more

c++ timer implemetation - Assigning a member function to signal callback function pointer

hi i have been tryng to implement a timer using posix timer libs, but i am making a mistake in the implemetation, i was using a example from the web and tryng to encapsulating in a class but, the compiler doesnt like it, basically tryng to asign the callback function [...] read more

Match ICMP packet Floodlight

I am building an SDN using Floodlight and mininet. There will be 4 switches and 2 hosts in this setup. The topology can be visualized as follows:enter image description here [https://i.stack.imgur.com/h0z1A.png] When using ping from h1 to h4, the ping packet will first use the path h1 -> s1 -> [...] read more

Display multiple map fragments in an activity simultaneously

I have an activity which holds multiple addresses (Street, City, Country, Postcode) and displays them to the user. Under each address, I want to display a MapFragment, passing in the address information and display the point to the user on the map. When I tried it, the app crashed and [...] read more

How to I determine whether an ASCII representation of integer is negative or positive

Here is an example: given the number -4, which is 0xFFFFFFFF in hex. I need to somehow get the first F (1111), then AND it with 8 If the result is greater or equal to 8, then it is negative. 1111 AND 1000 ---------- 1000 I have no idea how [...] read more

How can I extract first and last line from multiple text blocks separated with new line?

I have a file containing multiple tests with detailed action written one beneath another. All test blocks are separated one from another by new line. I want to extract only first and last line from the all blocks and put it on one line for each block into a new [...] read more

Get maximum available heap memory

I'm currently trying to figure out the maximum memory that is able to be allocated through the malloc() command in C. Until now I´ve tried a simple algorithm that increments a counter that will subsequently be allocated. If the malloc command returns "NULL" I know, that there is not enough [...] read more

How I do circular shifting (rotation) of int in Python?

In Java right rotation is done using: (bits >>> k) | (bits << (Integer.SIZE - k)) But how to do similar thing in Python? I tried to do (as described here): n = 13 d = 2 INT_BITS = 4 print(bin(n)) print(bin((n >> d)|(n << (INT_BITS - d)) & 0xFFFFFFFF)) [...] read more

Adding AutocompleteSupportFragment in Dialogue Fragment

I added a AutocompleteSupportFragment in a class that extends Dialogue Fragment. The first time I opened the Dialogue fragment, everything works fine. However, the second time, it crashes. I have tried to use getChildFragmentManager and it still crashes. My class heading. public class TaskPopupDialog extends DialogFragment if(!Places.isInitialized()) { Places.initialize(getContext(),apiKey); } [...] read more

How to prevent blinking vertices (primitives) while using persistenly mapped buffer?

I am writing a 2d renderer. In a real world example one draw call can handle 600 000 vertices. When buffer is bigger than 600 000, the renderer execute another draw call and so on. Problems occur when there are 2 or more draw calls. There are 2 cases I [...] read more

Serial communication between pc and Arduino through USB

I have some C++ code that I need to use for serial communication between PC and Arduino. The file "Serial.cpp" is including a file called "stdafx.h" that doesn't exist in the project or anywhere on my computer, which obviously causes an error. Other than that, I also get other errors, [...] read more

Microblaze MCS IO Bus - 0xC0000000-0xFFFFFFFF

I am unable to read/write in the IO space 0xC0000000-0xFFFFFFFF. I am able to read from 0x80000000-0xBFFFFFFF without error but as soon as I get to 0xC0000000, it hangs. The reason I want to use this space is I want to use IO_Addr_Strobe, IO_write_strobe & IO_read_strobe etc., and my understanding [...] read more

STM32F103xxxx In Application Programming Using Arduino

I am using Arduino_STM32 rogerclark's library. https://github.com/rogerclarkmelbourne/Arduino_STM32 . Now I want to Develop an In Application Programming(IAP) like a bootloader. Take Code from SD card and Store in Controller flash at 0x8010000 and then jump to that location and run the loaded new application. the code took from SD and [...] read more

HAProxy 1.5.4 Performance Tuning

I currently have HAProxy 1.5.4 setup using keepalived for HA on centos 7 using IPtables to create a transparent load balancer to load balance a number of cisco WSA proxy servers for internet filtering on an infrastructure of around 15,000 users running on vmware and cisco UCS with one GB [...] read more

ipfw dummynet per ip fair traffic shaping

I want to shape traffic in such way, that no specific user could exhaust WAN connection that much so other users would be affected. I have ISP link with 100Mbits/s bandwidth and sometimes some users can exhaust it when they download something from internet or via vpn from smb in [...] read more

Can't connect to a postgres server

I have a strange situation, I have created a second postgres server that will eventually become a slave to my current master, anyway for testing purposes I have currently installed postgres, and testing connections from other hosts. In my postgresql.conf I have a nice an easy:listen_addresses = '*'# what IP [...] read more

ipnat.conf - map and rdr won't work!

I can't put my mind around it, before reboot I was able to ssh in from outside to my jail and right now I can't! I even rebuild the whole system and even that didn't help:( anyone have any ideas? su-3.2# cat /etc/ipnat.rules map fxp0 lama -> 0/32 rdr fxp0 [...] read more

"ip rule to" works but "ip rule fwmark" fails - why?

I have a CentOS 6 (kernel 2.6.32) router with working OpenVPN client on it, and I want to redirect some traffic via VPN server. Client (192.168.60.159) sends request to router (192.168.60.6:1443), and router redirects it via VPN connection (10.200.0.54) to server (185.61.149.21:443). I've created a specific routing table tunde and [...] read more

RDP in 2008 R2 domain no longer working - possible Kerberos issue

Everything was working fine and no changes were made. For no apparent reason, we can no longer RDP to any domain computers except for the domain controllers themselves. This includes Windows 7 clients and non-controller 2008 R2 servers. After entering the password, we immediately get the following error message: "The [...] read more

Nginx IP transparency reverse proxying but upstreams need to be able to initiate connections to Internet

I have a docker swarm consisting of an Nginx service that serves as a reverse proxy for a couple of other upstream services, web and mail. Both web and mail service need to connect to an external service via HTTPS in order to perform authentication. The mail service needs to [...] read more

IPSec tunnel causes huge packets lost when pinging gateway and other machines

My Ubuntu machine is 10.0.0.15, my Windows machine is 10.0.0.10. My gateway, that routes the Internet traffic to the LAN is 10.0.0.1. When I ping the gateway from my Windows machine everything is fine - I get every single packet back. Same holds true, when I ping the Ubuntu machine [...] read more

How to configure IPsec (strongswan) interface, so that only assigned interface gets virtual ip?

I have already used this configuration a bunch of times and I haven't had this problem before. Basically I establish the tunnel connection, but after connecting (with swanctl --initiate --child ch_vti0 --ike ch_vti0) I get my virtual ip assigned on the appropriate interface vti0, but also I have the same [...] read more

Understanding Routes and Gateway for a TUN VPN in OPENVPN

I am trying to understand the network setup that gets configured in my machine everytime I connect to an OpenVPN (Tun mode). My OpenVPN client creates the following Routes: Destination Gateway Flags Refs Use Netif Expire 10 10.240.0.5 UGSc 1 1 utun1 10.128.16/24 10.240.0.5 UGSc 1 0 utun1 10.240.0.1/32 10.240.0.5 [...] read more

Calling Google Translator Service using C3 .net

I am using the below code for calling Google translator but getting an error. using System; using System.Net; using System.Security.Authentication; namespace ConsoleApp3 { class Program { static void Main(string[] args) { Console.WriteLine("Hello World!"); string input="Hello"; string languagePair="En/Fr"; string url = String.Format("http://www.google.com/translate_t?hl=en&ie=UTF8&text={0}&langpair={1}", input, languagePair); WebClient webClient = new WebClient(); webClient.Encoding = [...] read more

IPVS traffic doesn't seem to go through netfilter on the director node

I have the following setup on a director node running keepalived: * native IP 10.65.5.72 * VIP 10.65.5.230 * keepalived DR mode enabled for port 80 and 443 I was debugging a problem where I couldn't access the IPVS service from the director node itself, and during that process noticed [...] read more

Jboss EAP5 fails to start on Linux

I am trying to start JBoss EAP5 server on Linux CentOs machine. However, the process gets killed abruptly and I get nothing in the boot.logs. Please find the logs below: Server Library URL: file:/usr/share/jboss-5.1.0.GA/server/default/lib/ Server Log Dir: /usr/share/jboss-5.1.0.GA/server/default/log Server Native Dir: /usr/share/jboss-5.1.0.GA/server/default/tmp/native Server Temp Dir: /usr/share/jboss-5.1.0.GA/server/default/tmp Server Temp Deploy Dir: [...] read more

Why can't I ping 127.0.0.1 from some network interfaces?

I'm on OS Sierra. This is (part of) what I get on ifconfig ... en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500 ether 98:01:a7:b4:91:63 inet6 fe80::4e:52ae:9fa8:2e6c%en0 prefixlen 64 secured scopeid 0x5 inet 192.168.1.33 netmask 0xffffff00 broadcast 192.168.1.255 nd6 options=201<PERFORMNUD,DAD> media: autoselect status: active ... utun1: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1400 inet 10.161.136.55 --> 10.161.136.55 netmask 0xffffffff [...] read more

RabbitMQ SSL connection works from an Ubuntu14.04 machine but not from a CentOS 6 machine

I have setup a rabbitmq ssl connection on my remote server as per the docs here: https://www.rabbitmq.com/ssl.html I am using java rabbitmqclient to connect to the remote server and sending a hello message to a queue on rabbitmq-server, the connection works fine from my local ubuntu 14.04 machine but does [...] read more

Run OpenVPN server on alias IP

I want to configure OpenVPN server that works on alias IP. I changed the client config to have alias IP as remote and added "local 188.xx.xx.55" in OpenVPN config which is our alias IP. Also set "netd_interface=188.xx.xx.55" which is again alias ip. When the VPN connects and I check my [...] read more

RDS 2012 R2 some users are not able to logon after changed date and time on Connection Brokers

Due to a malconfigured NTP server of ntp.org, the date and time on all our servers and client was set to the date of tomorrow (1/1/2017 instead of 31/12/2016). We've manually changed the date back to the date of today on our Primary Domain Controller (PDC) and executed w32mt /resync [...] read more

How do I load balance outgoing connections with iptables and iproute2?

I have a server behind two public facing gateways INTERNET | | GW1 GW2 | | SERVER GW1's IP is 192.168.w.x, MAC aa:bb:cc:dd:ee:ff GW2's IP is 192.168.y.z, MAC ff:ee:dd:cc:bb:aa # note: w != y and I'm trying to load balance outgoing connections from the server. I've built upon pepoluan's solution [...] read more

Two Azure VM clones have different processor

I have two Ubuntu 16.04 Azure VMs created from the same image, in the same region (WestEurope), configured to be the same size (Standard A1, 1 vcpus, 1.75 GB memory) and created at the same time (days of difference). Inspecting the CPU info they are completly different, one being a [...] read more

Opcache not working properly

I got problem with Opcache. It's not working as I wish/desire.. This is my opcache configuration cat /etc/php/7.1/apache2/php.ini | grep opcache [opcache] opcache.enable = 1 opcache.enable_cli = 1 opcache.memory_consumption = 256 opcache.interned_strings_buffer = 16 opcache.max_accelerated_files = 8882 ;opcache.max_wasted_percentage=5 ;opcache.use_cwd=1 opcache.validate_timestamps = 0 opcache.revalidate_freq = 0 ;opcache.revalidate_path=0 ;opcache.save_comments=1 opcache.fast_shutdown = 1 [...] read more

Route ftp packets to one network interface, the rest to the other

I have an ubuntu 14.04 server with two NICs, each one connected to seldom routers, each with separated internet access. We want to redirect ftp ports traffic through the second interface, em1, and all the rest through the default interface p4p1. I have both interfaces up. I've followed the instructions [...] read more

Windows Server 2012 R2 - Help finding failed logon attempts source

I'm seeking help for this issue that I'm having in our AD domain controller where a lot of security events are being logged due to failed logon attempts by a (former) domain user that has been disabled and subsequently deleted. I'm trying to pin-point the origin of these attempts but [...] read more

Inconsistencies with Linux tc filter u32 matching on packet data payload - can someone explain?

I would just like some heads up on this as I really don't understand -why- this is the case. Further down is the TCPDUMP output (tcpdump -s0 -XXnni eth0 tcp port 80) of the 'HTTP' response a webserver gives when a normal GET request is made to it. What I [...] read more

Ubuntu Server 16.04 64bit had only 8Gb of RAM when 16GB are installed

I have one DIMM installed on a Lenovo x3550 M5 server. The OS is Ubuntu 16.04.2 64 bit uname -ra Linux hostname 4.4.0-62-generic #83-Ubuntu SMP Wed Jan 18 14:10:15 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux free -hm gives: total used free shared buff/cache available Mem: 7.2G 238M 6.5G 20M 474M [...] read more

Kerberos authentication ticket - Event ID 4768 - Audit failure

I am using kerberos to authenticate a user and its failing. Audit failure details in event viewer are following A Kerberos authentication ticket (TGT) was requested. Account Information: Account Name: HTTP Supplied Realm Name: TEST.COM User ID: NULL SID Service Information: Service Name: krbtgt/TEST.COM Service ID: NULL SID Network Information: [...] read more

4 TB external disk on Centos 5

I have an old server running CentOS 5(Kernel 2.6.18-92.el5). It is running a legacy application so I can't retire it yet. I had connected a 2 TB USB disk to it to take backups and the disk is almost full right now. I bought a new 4 TB disk but [...] read more

OpenVPN block SMTP Access Server completely

I've tried almost all iptables rules to block smtp on openvpn server but still clients clients can access remote smtp servers on port 25. I'm using openvpn access server. It's creating two interfaces as0t0 and as0t1. All users assigned ips from 172.16.0.0/12. Please help me what rules can be written [...] read more

Network configuration fault

I'm moving my router from Rpi with Rasbian to another pc device with ubuntu server 14. I have: - local network 10.0.0.0/16, with my router gateway 10.0.0.1 - lte usb device 192.168.8.1 in network 192.168.8.0/24 - lte usb device 192.168.10.1 in network 192.168.10.0/24 I have moved all network settings with [...] read more

Captive portal with iptables and local dns server

I'm trying to redirect all the browser's requests from my wifi interface wlan1 to a captive portal. I have a node web server running on my target on 10.4.30.34:4040. It has to redirect the browser directly to the web server, on the good port, like I entered "10.4.30.34:4040" in the [...] read more

CentOS Development Server Crashing Frequently

I am running a development server on a fairly old version of CentOS 5. This server has been live almost constantly for the past five years ago, so has been pretty stable. A while ago, it crashed during normal operation. I restarted it and it crashed again after a few [...] read more

unable to find driver - lamp debian

This is my php sample script: <?php try{ $db=new PDO('mysql:dbname=_mydb;host=localhost', 'root', 'xxxxxx'); }catch(PDOException $e) { echo "Error: ".$e->getMessage(); } ?> And I have returned: could not find driver Also: user@nbook:~$ php -i|grep PDO PDO PDO support => enabled PDO drivers => mysql PDO Driver for MySQL => enabled This is [...] read more

"No inittab file found" after reset

An old dedicated server (Debian with Raid1) wasn't responding today and now can't boot after manual reset. Last message is > No inittab file found. I still have access to filesystem via rescue system. Ran fsck and checked raid (both arrays are clean). Booting 'Debian GNU/Linux, kernel 2.6.26-2-amd64 Default' root [...] read more

PBR with iptables

I know question was answered multiple times, but this situation a bit different. So here is what I have: * All users must user default gateway on eth0, except one * That one must only use gateway on eth1 and must not under any circumstances use eth0 Separately this things [...] read more

LAMP server kerberos config to authenticate against a read only Windows KDC in a dmz

Background: We have a number of AD networks (domains) that are connected through VPNs and have established AD trust relationships. We have an externally hosted web server and have configured seamless authentication for any user within the trusted network. This works but the presence of the VPN to an external [...] read more

iptables rules for lvs using piranha gui

I am trying to bulid an lvs system, where 202.141.81.239 is the virtual IP and 202.141.81.241 and 202.141.81.242 are the lvs routers.Ths system is working fine in our intranet but is not through internet. The following is my iptables configuration # Generated by iptables-save v1.4.7 on Tue Mar 25 12:30:26 [...] read more

iptables 1.4.12 invert and --u32

This line in a script: iptables -A jk2_ddos -m u32 ! --u32 "0x1c=0xffffffff" -j ACCEPT will result in this error: iptables v1.4.12: u32: option "--u32" cannot be inverted. This seems not to work in iptables 1.4.12. In older versions it worked. I need something that does the same. The problem [...] read more

debugging smtp | ubuntu 12.04, postfix, dovecot

I cannot sucessfully connect to my smtp server from my mail client. I am getting the following errors in my /var/log/mail.log file Dec 21 15:08:04 pareto postfix/smtpd[11101]: SSL_accept:SSLv3 flush data Dec 21 15:08:04 pareto postfix/smtpd[11101]: read from B96D2180 [B96C1EB3] (5 bytes => -1 (0xFFFFFFFF)) Dec 21 15:08:04 pareto postfix/smtpd[11101]: read [...] read more

traffic shaping, prioritizing packets without using a bitrate ceil/max

I've written a script that shapes traffic into 3 pipes. The first pipe needs to be high priority and always be send first. This works perfectly now on 1 condition. I enter a correct ceil/max bitrate. This script is written to work an a device that will work with lots [...] read more

BAT file will not run from Task Scheduler but will from Command Line

I'm trying to run a BAT script from Task Scheduler in Windows 2008 R2 and it runs for 3 seconds and then stops. It says it successfully completes but I know it doesn't. I can run this script from the command line directly, and it runs just fine. The bat [...] read more

Add route on OpenBSD for DSL modem on external network

I'd like to be able to access my DSL modem, which is acting as a bridge, from within my local network. I've got a setup like this: {Local network 192.168.1/24} | rl0:192.168.1.250 [OpenBSD Router] rl1:up tun0:pppoe | [Bridge DSL modem IP:192.168.1.254] | {Internet} I'd like to access the Bridge. To [...] read more

Disable/pause AHK script while game is minimized

I have an AHK script that allows me to bind joystick presses to keystrokes. These keystrokes are used to trigger functions in a trainer that runs in the background while I play a game. The script works fine, but the problem is that the joystick bindings send unwanted input to [...] read more

Linux booting stop at Starting kernel when using Yocto build image with SD card

I'm tring to porting linux on imx6 PDK B/D(imx6-qaudplus-sabreauto) with Yocto build image. my customize sdcard image (mixed imx6/8)= * u-boot.bin(iMX6 Yocto bitbake result) * zImage(iMX6 Yocto bitbake result) * .dtb file(iMX6 Yocto bitbake result) * rootfs(iMX8 Yocto bitbake result) but stop at Starting kernel... and no more console printed. [...] read more

I got a SIGILL and JVM crashed when I booted a java application with --agentpath:libxxx.so on AIX 7.1

My dynamic shared library complied with CPPFlAGS: -q64 -G. The compiler version is IBM XL C/C++ for AIX, V11.1 (5724-X13) Version: 11.01.0000.0024 when it was started, then crashed, here is part of information in hs_err*.log. It seems that this error occurred by dlopen # # A fatal error has been [...] read more

Linux-Yocto, ARM: VFS: Cannot open root device "ubi0:root" or unknown-block(0,0):

I'm booting from NAND zImage and rootfs (UBIFS) to the ARM board (yocto-project building). global.bootm.image="/dev/nand0.root.ubi.kernel" global.bootm.oftree="/dev/nand0.root.ubi.oftree" global.linux.bootargs.dyn.root="root=ubi0:root ubi.mtd=root rootfstype=ubifs" The process is just erase, format UBI volume and write UBIFS. ubiformat /dev/nand0.root ubiattach /dev/nand0.root ubimkvol -t static /dev/nand0.root.ubi kernel 8M ubimkvol -t static /dev/nand0.root.ubi oftree 1M ubimkvol -t dynamic /dev/nand0.root.ubi [...] read more

debugging boltd and Dell TB16 on Dell Latitude 5491 and Xubuntu 18.04

Every now and then my Dell TB16 dock device stops working i.e. port replication is off, also the dock's white LED goes off. * OS: Xubuntu 18.04.2 LTS * Kernel: 4.15.0-54-generic #58 * System: Dell Latitude 5491 BIOS 1.8.1 05/23/2019 I've installed the thunderbolt daemon boltd but the boltctl command [...] read more

Virtual machine has terminated unexpectedly during startup with exit code -1073741819 (0xc0000005)

I have installed VB on a new machine running Windows 10 Pro 1803 (build 17134.556) and running any machine instance always fails with this error: The virtual machine 'linux' has terminated unexpectedly during startup with exit code -1073741819 (0xc0000005). More details may be available in 'C:\Users\osama.shabrez\VirtualBox VMs\linux\Logs\VBoxHardening.log'. Result Code: E_FAIL [...] read more

Cannot down-clock AMD GPU on Manjaro

So, I have an RX590 FatBoy, which albeit very nice comes factory overclocked which is bad, since it's cooling isn't up to par. On Windows, I lowered the voltages via the Catalyst app and voila - all overheating problems were gone while retaining all the performance I needed. On Manjaro [...] read more

External SSD Drive won't mount on OSX

A colleague at work has a Kingston 240GB SSD drive which has come out of a now dead computer. We want to be able to recover some data from it (no backups sadly) however the drive won't mount properly. I am using an Anker USB3 external HDD enclosure which I [...] read more

UBI layout volume not found

I am following Bootlin's embedded Linux training which aims to put an embedded Linux system on an Atmel SAMA5D4 Xplained board (theory slides, practical lab instructions) and I am stuck a putting the whole system on the NAND flash. They ask me to put the DTB, the kernel, the root [...] read more

Traffic going to both eth0 and tun1

I'm working on Transmission over OpenVPN with split tunneling but I'm facing an issue with the firewall rules. So I decided to disable the firewall and check if it's working. It is but in a strange way. IPTables is set up to allow Transmission over tun1 only. The whole rules [...] read more

Kernel migration from 3.10 to 4.19 causes JFFS2/MTD/CFI mounting issues

I am trying to upgrade the kernel from 3.10 to 4.19 on an Atmel at91sam9260 system, everything otherwise unchanged. The system has 8 partitions on a NOR flash that work fine on 3.10. Booting into an initramfs on 4.19 followed by mounting the unchanged JFFS2 partitions reveals a lot of [...] read more

PCI Read Error on QNX for PowerPC

My team is developping on an MPC8313 PowerPC Dev Board and we're trying to write a network driver. The network card is a PCIe card connected to a PCIe-to-PCI bridge (PI7C9X111SL). The pci utility detects the card and can read and write the PCI config space. The problem is when [...] read more

Replacing an ssd on notebook (asus N501VW)

I'm finally running out of space on a 128GB ssd on a notebook (N501VW) and am thinking of replacing it with a larger, 500GB, drive. The setup: * 1 notebook (N501VW) running Win 10 (x64) * 3 drives (128GB ssd (M2) (C:), 1TB hdd (D:), 500GB ssd (M2)) 128GB: C:\WINDOWS\system32>fsutil [...] read more

Why isn't my forced MAC address change working (Raspberry Pi)?

I'm working with Raspberry Pi Zeros on a subnet. I bought external Ethernet adapters for each one to connect them to one another. Unfortunately, these ethernet adapters all came with the exact same MAC addresses, making communication between the Pis near impossible. Because of that I've tried forcing a change [...] read more

System hang and black screen BugCheckCode 278 and BugCheckCode 0

For past two days the system would hang up or enter black screen and won't restart right away (after pressing restart button) but at one instant it generated Blue Screen (BugCheck Code 278). This issue has been occurring only during gaming(for one game during loading screen for other mid game [...] read more

Dell desktop falls asleep in a couple minutes, ignores power/screen saver settings

My parents' Dell Inspiron tower goes to sleep within ~3 minutes of inactivity, despite every power setting in Windows (screen saver, turn off screen, go to sleep, turn off hard-disk, etc.) either turned off or set to 60 minutes. This answer claims that Dell has been known to bundle their [...] read more

Windows 10 Explorer crashes when opening "new" context menu, need help deciphering dump file

As the title says, whenever I attempt to open the "new" sub-menu of the right click context menu in Windows 10 explorer locks up and then crashes a few moments later. This issue only appeared in the last couple days and I suspect it is a result of the Creator's [...] read more

Two openvpn connections: one with redirect-gateway and a second one for private network

I have a personal VPN that I use as a default gateway for all Internet traffic when I'm on the road. This works great and I have no problem. I also have a work VPN, which I need to connect to reach machines on their private network. What I want [...] read more

different speed ssd partitions

I have Samsung NVMe SSD 960EVO 250GB disk and it gives me some weird result when testing read speed using hdparm -tT. Speeds before trim /dev/nvme0n1: Timing cached reads: 24486 MB in 2.00 seconds = 12256.70 MB/sec Timing buffered disk reads: 5502 MB in 3.00 seconds = 1832.95 MB/sec jkalmar@supercomp:~> [...] read more

Kworker thread has high CPU usage

I have a kworker thread with high cpu usage, which is causing my touchscreen to be very lag-y and unresponsive. Running a beaglebone with Debian. uname -r 4.1.15-ti-rt-r43 pid user pr ni virt res shr s %cpu %mem time+ command 90 root 20 0 0 0 0 R 34.7 0.0 [...] read more

HP Proliant getting down with Critical error LED Blinking - what then?

After a few hours of correctling working, our proliant Server stop calculus with the System Healt LED 12 blinking, which according to the documentation ( http://h20628.www2.hp.com/km-ext/kmcsdirect/emr_na-c01706108-8.pdf ) is the sign of a "Critical system failure detected (processor, memory, regulator, thermal event, fan, NMI)" (page 96). SSH is then lost. We [...] read more

PPTP error 619 when accessed externally

I set up a PPTPD server on Arch Linux. If I connect to the VPN using the server's local IP (192.168.1.107), it works, but if I connect to the VPN using the external IP address, then the client results in error 619. Any help would be greatly appreciated! Output of [...] read more

Postfix SMTP SSL config: Can't send email but can receive it with SSL

I am trying to finish configuring my postfix/dovecot mail server that sits behind my home's router/firewall. I'm on Mint/Ubuntu 12.04. I'm close. I can connect/retrieve emails via SSL but can only send email from a client when not using SSL, just username/password. If I attempt an SSL connection with the [...] read more

Recieved BSOD after restart

When i start my laptop i get this error "DPC_WATCHDOG_VIOLATION" i really donyt know what is the issue... can some one help.... -------------------------------------------------------------------------------- DUMP FILE Microsoft (R) Windows Debugger Version 6.3.9600.17336 AMD64 Copyright (c) Microsoft Corporation. All rights reserved. Loading Dump File [I:\121115-55411-01.dmp] Mini Kernel Dump File: Only registers and [...] read more

Windows 8.1 dual-boot with openSUSE boot failure

I already have Windows 8.1 on my newly built PC and wanted to dual-boot with openSUSE. I wrote the install image to a USB, but the install kept hanging so I used network install (also written to a bootable USB). Before install I created a separate 100 GB partition on [...] read more

Suspend does not work on Debian Jessie

Today I observed that suspend sometimes does not work properly in freshly installed Debian Jessie. After executing suspend (Alt + Shut Down button) the following message appears on black screen: Loading, please wait... The syslog is as follows. I kindly as for any suggestions. Jul 12 18:53:10 svarog kernel: [ [...] read more

pm-hibernate does not turn off system

I'm trying to make pm-hibernate to work on my Ubuntu 14.04 system. When I invoke sudo pm-hibernate display turns off and I can't do anything anymore but computer does not turn off. All I have found in logs is: Mar 17 21:40:25 dmitry-pc kernel: [ 0.000000] PM: Registered nosave memory: [...] read more

Mono is crashing on MAC OS X with Keepass 2.23

Mono is crashing on MAC OS X (10.8.4) with Keepass 2.23 while accessing password database. Using keepasshttp with firefox. Any workaround for this ? =========================================================== Process: mono-sgen [7586] Path: /usr/bin/mono Identifier: mono-sgen Version: ??? Code Type: X86 (Native) Parent Process: bash [7194] User ID: 501 Date/Time: 2013-08-15 13:34:28.515 +0530 OS [...] read more

Why can't I connect to an AFP server over VPN on OS X 10.8

I have set up a VPN connection on my MacBook Pro OS X 10.8.5 laptop, to my office network so I can access my AFP file server from home. The VPN connection appears to be working correctly. The Status reads Connected and I am getting both a connect time and [...] read more

Bluetooth / Bluez: No reply to ping over bnepX interface

I have trialed to use Network, NAP profiles on Bluetooth. On Host, xUbuntu 13.04 I have followed as here. This Host or XUbuntu machine is behind proxy & runs on virtual machine. It is installed with Bluetooth version 4.101 On embedded board, ping 173.194.112.211 responds as below: PING 173.194.112.211 (173.194.112.211) [...] read more

command to write to physicaldrive?

I have a bat file that we use to write meaningless data to a harddisk. But I dont know what exactly it means... Here is the command: dtlite2 of=\\.\physicaldrive1 bs=256k limit=200m passes=1000 disable=cache pat_part1=0xffffffff pat_part2=0xffffffff pat_part3=0x0 pat_part4=0x0 dlimit=2048 platform is windows. This is run from a bat file. read more

Video from vhs via USB capture device on Linux

I want to transfer video from a VHS tape to my computer with Arch Linux, using a USB capture device that comes with Roxio Easy VHS to DVD, which I recently bought. I tried to plug in the device, and it was properly recognized. From /var/log/messages.log, em28xx #0: Identified as [...] read more

Laptop computer grahpic opens and loads slowly

So i have this laptop whenever i open a folder, close a folder, or do anything graphical it runs slowly. and when i say slow i mean you can actually SEE in slowmo the animation running. Say for instance you want to open a folder. you can see the full [...] read more

Wine crashes when trying to run portable version of Firefox

I think there is something wrong with my Wine setup, but I don't know how to fix it or even what it is. Others have gotten this program to work without problems in Wine. This is the console output that I get from Wine before it crashes. > fixme:system:SetProcessDPIAware stub! [...] read more

OSX Panic about once a week

I am running OSX 10.6.6 and I this is the second kernel panic in 2 weeks. Here is the log that gets sent to Apple. Help! Model Name: MacBook Pro Model Identifier: MacBookPro6,2 Processor Name: Intel Core i7 Processor Speed: 2.66 GHz Number Of Processors: 1 Total Number Of Cores: [...] read more

xorg.conf: Why does this have no effect?

Here is my xorg.conf file. The problem is that my resolution setting 1600x900 is getting ignored. The resolution keeps popping to 1280x1024 Edit The resolution comes up as 640x480 after unplugging the physical monitor. When my file gets ignored, the system seems to read my monitor to find it's capabilities [...] read more