I have setup Zeroshell as a gateway for a student wireless network I have set 1 interface ETH02 as the external card this has NAT enabled. There are 2 other cards one ETH01 is connected to the College Network to allow authentication to AD. The last card ETH00 is on the student wireless network (at the moment I am Just using 1 wired workstation with a crossover cable on this port). I have tested Captive portal and Proxy/dansguardian. and everything is fine. I can access http and https sites. The only problem is the windows update application in windows 7 will not search for updates. It produces Error Code 8024419. I have turned off the proxy and the captive portal so that a browser session can access any websites without logging into the portal and without filtering. But the windows update application still cannot search for updates.