I've got a web server running Windows Server 2008 R2, SP1, and IIS7.
It has been running fine for some time, but recently begun having difficulty with outbound HTTP.
Attempts to hit web pages from the server console using IE or firefox are incredibly slow - to the point that some sites will not load at all, and any downloads initiated will time out.
However, people who are accessing web pages on that machine are not noticing any latency. I can FTP data down to the machine at very good speed. Pinging sites gives me a seemingly normal response with no unusual latency.
I don't see any software that looks alarming, and no unusual services - so I don't think that the box is compromised.
I've watched Resource Monitor to see if there's unusual network activity, and it looks pretty normal.
The machine has been rebooted recently, which did not seem to impact the problem.
I do not believe it is a network firewall, as other machines in the same network do not seem to have this problem.
What can I use to try to pin down the problem? Thanks!
tl;dr: HTTP requests from the server to the outside world, like pulling up serverfault.com is incredibly slow.