VPN Access with a new router

We have been using VPN without problem for about 4 years now. Recently our
DSL modem went on the fritz so we had Covad come in and they replaced it with
a new one (Netopia). While they were here I mentioned to them that we need
port 1723 open to allow VPN connections. The technician searched through all
the settings on the old modem and could not find anything specific for this
port. On the new modem he setup a port forwarding rule to send all VPN
traffic to the External NIC (192.168.1.2) on the SBS 2000 server. Much to
our dismay we are still unable to establish a VPN connection with this new
modem.

Is there anything else I need to tell Covad to configure on the new modem
that I missed? I don't have the password for the modem so Covad will make
the changes remotely.

Thank you,
Don

Merv
Fri Nov 02 11:45:23 PDT 2007

Assuming your using PPTP for VPN traffic, in addition to forwarding port
1723 to the external NIC, you also need to forward GRE Protocol 47 to the
that NIC. Sometimes this is called PPTP Passthrough or (VPN Passthrough) in
the router configuration. You should probably also re-run ICW and re-setup
VPN on the SBS server.

SBS 2000 VPN Setup
http://groups.google.com/group/microsoft.public.backoffice.smallbiz2000/msg/b4a46a30eaf002d8

--
Merv Porter [SBS-MVP]
============================


"Don" <Don@discussions.microsoft.com> wrote in message
news:04BFC0FD-C8FD-4FEE-8864-19C36B07118F@microsoft.com...
> We have been using VPN without problem for about 4 years now. Recently
> our
> DSL modem went on the fritz so we had Covad come in and they replaced it
> with
> a new one (Netopia). While they were here I mentioned to them that we
> need
> port 1723 open to allow VPN connections. The technician searched through
> all
> the settings on the old modem and could not find anything specific for
> this
> port. On the new modem he setup a port forwarding rule to send all VPN
> traffic to the External NIC (192.168.1.2) on the SBS 2000 server. Much to
> our dismay we are still unable to establish a VPN connection with this new
> modem.
>
> Is there anything else I need to tell Covad to configure on the new modem
> that I missed? I don't have the password for the modem so Covad will make
> the changes remotely.
>
> Thank you,
> Don