We provide a managed web filtering service to our academic customer.
In order for our service to work, desktop machines must have access to our IP range on ports 80, 443 & 3128.
I installed the service on-site several weeks ago and it was running perfectly, until 3pm two days ago when the client machines could no longer connect to us on port 80.
This is definitely a problem related to our customers network, as no other customers have reported the problem (we have several thousand customers) and we have been unable to reproduce the problem.
The clients are still able to connect to us on ports 443 and 3128, but not 80. We tested this by creating a telnet session to our hostname. The clients are, however, able to connect to any other host/IP on port 80 apart from ours.
We even created a rule on the watchguard to allow traffic from anyone to anyone on port 80 and moved it to the top and the connection still fails.
We then moved a test laptop outside of the firewall and it COULD connect to us on port 80!
So it seems like Watchguard is actively blocking connections to just our IP range.
Any suggestions would be hugely appreciated as we are running out of ideas and the net effect is that the students do not have web access until this has been resolved.
Start Free Trial
