Port 80 performance slow compared to port 8080
Posted on 2004-08-23
We have a web server sitting in a DMZ. Performance when connecting to the site from the outside world is fine, but it's remarkably sluggish when connecting from the inside. There are no firewall blocks set up and syslog shows no complaints. Also, our content filter is not touching this site. A sniff shows multiple lost segments and retransmits.
However, our dev site on the same server, going over port 8080, is lightning fast (from inside or out). The production site is fast on the web server itself, but is slow from another machine in the same DMZ. Strangely (to me, anyway) if I change the IIS settings for the production site to 8080 (from 80) it, too, is suddenly very fast from the inside.
There are no access rules affecting the box internally, and the internal DNS is set up properly.
Is there something with PIX that affects port 80 traffic that is not obvious at first glance? Or a bug in the IOS?