Redirect traffic over Port 80 due to strict firewall

[LuckyTaxi]

I support a lot of consultants who work remotely from client's offices. A couple of these offices only allow outgoing traffic via port 80. This means email via outlook is banned and the only method is to go over the web. However, we run oracle collab suite and the single sign on runs on port 7777. Now I'm stumped, is there a way to route traffic over port 80 and then when it hits our firewall, it knows that to redirect it to the correct box/port? I've heard of implementations where SMTP runs over port 80 but I've never done it.

 

[bobdole369]

squid will do this transparently. You could set up a VPN tunnel through port 80 too.