My application requirement is like below. Application will run on domain admin system which will ping all machine under that domain, it will take disk drive, CPU and RAM details from all domain systems.
Whenever I'm trying to ping machine I'm getting error that
"The RPC server is unavailable. (Exception from HRESULT: 0x800706BA)"
Code I'm using to connect remote machine is
ConnectionOptions options = new ConnectionOptions(); options.EnablePrivileges = true; options.Impersonation = ImpersonationLevel.Impersonate; options.Username = System.Configuration.ConfigurationSettings.AppSettings["AccessUserName"].ToString(); options.Password = System.Configuration.ConfigurationSettings.AppSettings["AccessPassword"].ToString(); options.Authority = "ntlmdomain:" + System.Configuration.ConfigurationSettings.AppSettings["DomainName"].ToString(); options.Authentication = AuthenticationLevel.Packet; ManagementScope scope = new ManagementScope("\\\\" + sMachineIP + "\\root\\cimv2", options); scope.Connect();
I found the solution for this. I did it by enabling
Windows Management Instrumentation (WMI) rule in Windows Firewall.
- Open Windows Firewall.
- Allow app or feature through Windows Firewall.
- Enable Domain Privilege for
Windows Management Instrumentation(WMI).
There are some other things also that you can check.
(gpedit.msc)to edit the
Group Policy object (GPO)that is used to manage Windows Firewall settings in your organization. Open Computer Configuration, open Administrative Templates, open Network, open Network Connections, open Windows Firewall, and then open either Domain Profile or Standard Profile, depending on which profile you want to configure. Enable the following exception:
Allow Remote Administration Exceptionand
Allow File and Printer Sharing Exception.
services.mscusing Windows Run. In Windows Services, Verify that
Remote Procedure Call (RPC)is running and set to auto start after restart.
services.mscusing Windows Run. Verity that
Windows Management Instrumentationservice is running and set to auto start after restart.
The RPC server is unavailable. (0x800706ba) can occur when Windows Firewall (or any other firewall) blocks WMI connection. See Connecting Through Windows Firewall and related articles.
The code is running fine when I'm adding domain admin under remote machine's WMI Control remote security property. please check below screenshot.
I doubt that this is really true. When you don't have permission to access WMI you usually get
Access is denied error.
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