VPN Connection problem

[InOrbit]

I am using w indows 2000 server sp4 in anactive directory domain.
The server is a DC with Routing and remote access installed.

I can dial in, authenticate and connect to the server with no
problems. However when i try to connect via tcp/ip the vpn hangs on
the authentication, its looks like its going to connect but doesnt.

This is a small network with a Linksys router. PPTP is enabled along
with the relevant ports so I know its not that. The server has only 1
nic.

Does anyone have any ideas as to where i should start looking first?

Thanks.

 

[jburns]

Don't know if this helps or not, but I had a very similar
problem using the Cisco VPN client across any connection.
What I ended up trying was setting the MTU of the Network
adapter in the client PC to 1400.

cheers, Jef

 

[Robert L [MS-MVP]]

what's the error code?

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[Charles Gilman]

I'm having the same problem. Everything was working before
installing SP4. Now I can dial in but attempting to go
through the Linksys router and the cable modem results in
the verifying user/password getting error 721: remote not
responding. I can still pptp with Linux so I believe the
problem was caused by SP4.