Forum Running vBulletin 4 behind a load balancer
 

We have a cluster of servers running vBulletin 4. The port these webservers run on is 2201. The load balancer on the front end responds on http/80. I've discovered a few instances where vBulletin will redirect to a URL on the backend port, for example when an admin logs in/out of the admin control panel:

http://forums.com:2101/admin/index.php