I have set up Zeroshell as a routed Captive Portal, with 192.168.n.n on one side and 10.7.n.n on the other. I have set up NAT, AD Authentication works fine, and I’ve set up DNS to use my local DNS Servers as forwarders, and everything works – almost!!
The problem is, our organisation uses a proxy server for all Internet accesses on the 10.7.n.n side. If I put this proxy address into Internet Explorer on the 192.168.n.n side, I cannot access the logon portal page. If I remove it I can, but the Internet won’t work until I put this address back in after authentication!