[pptp-server] What Ports does PPTP use?

[awilliam at whitemice.org]

>I want to redirect PPTP packets that are coming FROM the INTERNET 
through
>the LINUX FIREWALL to the Windows NT machine. All I need to know
>is what ports Microsoft PPTP packets come across on so I can redirect
>them to the Windows NT 4.0 server.

I believe it is port 1723.