Publishing Web Server on ISA 2004

A couple of weeks ago I was working at a customer site who wanted to publish their POP3 and SMTP server as well as their web server. Publishing the SMTP and POP3 server was as simple as going through the mail server publishing wizard but it took me two days to find out out why the web publishing wizard didn't work as expected! It was nothing wrong with the the rules created by the wizard, Something was grabbing the traffic on port 80 so that the traffic couldn't reach the destined web server and this was the local IIS on ISA 2004 server. Stopping the "Default Web Server" and restarting IIS on the ISA 2004 server fixed the issue.