Internet connection not working with Apple Software

It's been a while since I started having this issue: every time I go back to my parents house in Italy, I'm not able to connect Safari, iTunes, even the command line on my parents wifi. Google Chrome, Firefox and non-apple software have no problems. I have a mac and is kind of ok, I just have to use Chrome instead of Safari the 2 days I stay to my parents but is kind of annoying and I don't even know what to look for... Any suggestions?

UPDATE:

So I looked into /etc/resolv.conf and this is its content:

#
# macOS Notice
#
# This file is not consulted for DNS hostname resolution, address
# resolution, or the DNS query routing mechanism used by most
# processes on this system.
#
# To view the DNS configuration used by this system, use:
#   scutil --dns
#
# SEE ALSO
#   dns-sd(1), scutil(8)
#
# This file is automatically generated.
#
nameserver 192.168.1.1

Not very useful so I typed in terminal scutil --dns as suggested by spiff:

DNS configuration

resolver #1
  nameserver[0] : 192.168.1.1
  if_index : 5 (en0)
  flags    : Request A records
  reach    : 0x00020002 (Reachable,Directly Reachable Address)

resolver #2
  domain   : local
  options  : mdns
  timeout  : 5
  flags    : Request A records
  reach    : 0x00000000 (Not Reachable)
  order    : 300000

resolver #3
  domain   : 254.169.in-addr.arpa
  options  : mdns
  timeout  : 5
  flags    : Request A records
  reach    : 0x00000000 (Not Reachable)
  order    : 300200

resolver #4
  domain   : 8.e.f.ip6.arpa
  options  : mdns
  timeout  : 5
  flags    : Request A records
  reach    : 0x00000000 (Not Reachable)
  order    : 300400

resolver #5
  domain   : 9.e.f.ip6.arpa
  options  : mdns
  timeout  : 5
  flags    : Request A records
  reach    : 0x00000000 (Not Reachable)
  order    : 300600

resolver #6
  domain   : a.e.f.ip6.arpa
  options  : mdns
  timeout  : 5
  flags    : Request A records
  reach    : 0x00000000 (Not Reachable)
  order    : 300800

resolver #7
  domain   : b.e.f.ip6.arpa
  options  : mdns
  timeout  : 5
  flags    : Request A records
  reach    : 0x00000000 (Not Reachable)
  order    : 301000

DNS configuration (for scoped queries)

resolver #1
  nameserver[0] : 192.168.1.1
  if_index : 5 (en0)
  flags    : Scoped, Request A records
  reach    : 0x00020002 (Reachable,Directly Reachable Address)

I am not sure what this should look like... A per the Console.app I have no clue of what to snipshot here... :(