Windows2k PPTP vpn through NAT

Archived from groups: comp.dcom.vpn (More info?)

I am pretty sure that I have connected to pptp server from behind a
firewall before. I am no expert on PPTP, but I beleive it uses a
combination of the ip protocol gre and a tcp port for its communication.
What firewall is on your lan? Does it support connection tracking for pptp?

Gary Armstrong wrote:
> Hello NG;
>
> I'm trying to establish a vpn connection using the default client and
> server that comes with Windows 2000. I can successfully connect using
> dial-up but not with my lan, so I'm fairly convinced that NAT is my
> problem.
>
> I've read that there was an update on this platform to make L2TP vpn NAT
> capable, but really nothing about PPTP. So did it always work or is it a
> "never did never will" thing?
>
> If it does work are there any router requirements for PPTP (ie NAT-T
> which I think is required by L2TP)?
>
> TIA
> Gary
>
> Note: I have no control over the server so I can't switch to L2TP/IPsec