Hello Guys,
I would like to ask for your opinion regarding below issue:
I have following issue:
Website https://hw.ac.uk is not opening from inside of the organization,
The same website works fine from outside.
Nslookup shows different output:
if DNS is set as internal 172.20.12.5 it fails to display the website
f DNS is set as external 8.8.8.8 it works fine
C:\WINDOWS\system32>nslookup hw.ac.uk
Server: SBC-DC01.myorganization.ac.uk
Address: 172.20.12.5
Non-authoritative answer:
Name: hw.ac.uk
Addresses: 2002:89c3:971e::89c3:971e
2002:89c3:6050::89c3:6050
2002:89c3:ab28::89c3:ab28
2002:89c3:c20b::89c3:c20b
2002:89c3:ab12::89c3:ab12
2002:89c3:e231::89c3:e231
2002:89c3:e222::89c3:e222
2002:89c3:f843::89c3:f843
137.195.96.80
137.195.150.31
10.6.67.16
10.6.67.15
137.195.171.40
137.195.171.18
137.195.226.34
137.195.248.67
137.195.226.49
137.195.194.11
137.195.151.30
C:\Users\adminpw>nslookup hw.ac.uk
Server: dns.google
Address: 8.8.8.8
Non-authoritative answer:
Name: hw.ac.uk
Address: 137.195.101.213
If I change the DNS servers to 8.8.8.8 for a client machine inside my organization the website loads fine.
I am not server guy, so I have no idea what is causing it.
As a network person I have checked basic connectivity and everything is ok,
I have checked and disabled firewall filters,
I have done tests with local firewall disabled.
Regards,
Przemek
