Communication between WorkSite Web and your remote clients is channeled through ports 80 or 443 (SSL) by default. If WorkSite Web is in your DMZ and your WorkSite Server is behind the firewall, then you will need to open ports 1080 and 1081 on the firewall. This will allow iManage.dll on the WorkSite Web server in your DMZ to communicate with the WorkSite server on your internal network.