I managed to get ISPConfig setup behind IPCop perfectly from this thread by accessing ISPConfig through the internal IP (192.168.10.10:81). However, I stupidly changed the "Server IP" setting under ISPConfig to be the outside address and now I cannot access ISPConfig at all. I believe it's because IPCop uses port 81 as well which conflicts with ISPConfigs. Is there a way I can easily change it back or change the port of ISPConfig so it doesn't conflict with IPCop? Here's the error log of apache2: I tried setting a DMZ Pinhole to access 81 from my GREEN network from green address 192.168.1.103.