Hi,
I've had a recurring problem on our office network where some computers suddenly stop being able to access certain websites. We're currently using a mixture of FC3-5 behind an OpenBSD gateway, which performs firewalling and NAT; however we had the same problem when using an FC5 gateway.
The computer in question at the moment is running FC4, has no problems resolving the IP address of the website, and its routing tables are fine. It doesn't have a firewall, and can access all other websites no problems, as far as we can tell. Doing a tcpdump shows that the http packets are going out and ack packets are coming back, but no http data comes back from the website.
I've tried accessing the website using Firefox, elinks and using telnet to do the basic GET /index.htm etc. They all hang after the sending the request.
None of the other computers in the office have any problems connecting to this website.
I'm stumped - any help gratefully received.
Cheers,
Chris