Our company website is working fine and is accessible externally however all internal clients cannot access the site through our Smoothwall filter.
Our website is on the same domain as our internal domain and we have a www record in DNS pointing to the external web server’s IP address.
None of our clients can navigate to or ping the website. I logged into the Smoothwall and under the IP Tools section ran a ping to the company website and got 100% packet loss yet pings to all other and obvious blocked sites get through fine so it’s not filtering.
Also if I run the ping tests from the 4 internal Ethernet port interfaces we have setup in Smoothwall I get a 100% failure yet if I use the external Ethernet port it gets a working ping.
It seems to be a DNS issue and the Smoothwall doesn’t seem to know how to either get to our website or deal with the response back from our internal DNS server, or possibly isn’t getting a response back.
The strange issue that has really stumped me is both my IP address and one other in our internal range can access the site fine internally. My IP and the second one that works are both added as Exceptions in the Smoothwall but so are my colleagues and they are all getting site unavailable.
This has been working fine. Any ideas/pointers?