I am using external name servers and inserted an "A" record for test.domain1.com to point my external IP. I have Apache 2.2 installed on a Windows machine that is using mod_proxy to forward requests to my LAMP server (with ISPConfig installed). All port 80 traffic is forwarded to the windows box with Apache / mod_proxy. Everything is behind a NAT firewall. With everything setup as it is currently, I get the "Shared IP" message when trying to go to either of the two sites I have setup in ISPConfig. If I take the windows box out of the equation and forward port 80 traffic directly to the LAMP server, the sites appear as they should. Is there something I'm missing?