Re: Newbie: VPN Configuration - Server behind NAT

From: Robert L [MS-MVP] (noreply_at_hotmail.com)
Date: 04/07/04 

Date: Wed, 7 Apr 2004 08:39:21 -0500

what's the error code? 

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"Camilo Andres Arango" <camilo@tallerinternet.com> wrote in message 
news:9362c811.0404062054.36c9f9@posting.google.com...
> Hello. I have a small SoHo network with DSL Internet access. My DSL
> router (GreatSpeed GS-B240G) provides NAT functionality, and all
> internal machines use it as the gateway. Router, server and
> workstations are all conected to a switch.
>
> I have a Windows 2000 AS Server on my network, which I'm trying to
> configure as a VPN Server. So far, I have been able to set up the
> server and properly connect from a Windows 2000 client inside my LAN
> network. I have configured my VPN to run under PPTP protocol. No L2TP
> (yet).
>
> The problem comes when trying to connect from the Internet. I have
> setup a NAT rule on my DSL router (RDR flavor rule) to properly map
> all incoming traffic by all protocols/ports to the VPN server machine.
> In other words, Im exposing this server to the internet.
> So far I have tested from outside: PC Anywhere, FTP, SMTP, HTTP, SMTP
> and everything works fine.
>
> However, when connecting from the Internet, clients can't
> authenticate. I always get an error when client is validating
> password. I have tried all authentication protocols, including PAP,
> with no success.
>
> What could I be doing wrong?
> Any help will be greatly appreciated!!
>
> Best regards
>
> Camilo Arango

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