Thread:Project:Support desk/Unable to Determine IP/reply

Oh also, this might help. My network topology might be causing the proxy issue, although I cannot change it for technical and security reasons.

 -  --(192.168.1.0/24)--  --(10.0.0.0/24)-- 

You will have to trust me that the port forwarding is done correctly, because the rest of the site works fine, including a wordpress front page and phpBB forums.