[pptp-server] What Ports does PPTP use?

[Scott M. Stone]

On Sun, 2 Jul 2000 awilliam at whitemice.org wrote:

> >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.

1723 UDP to be exact.  Make sure you're forwarding 1723/udp and not
1723/tcp :)  Also you have to enable IP protocol 47 as well.  If your
linux firewall is doing masquerading, then you must have the ip_masq_vpn
patch/module, and make sure to 'modprobe ip_masq_pptp' or nothing will
work.

The ip_masq_vpn patch comes with 2 modules, one for IPSEC and one for
PPTP.  Haven't tried the PPTP one yet, but the IPSEC one works great.

--------------------------
Scott M. Stone, CCNA <sstone at taos.com>
UNIX Systems and Network Engineer
Taos - The SysAdmin Company