Windows 2003 server and VPN via RAS

[mgriss]

Why am I unable to connect to my VPN server? Stops at "Verifying username and password".

Configuration:

Windows 2003 server SP1
Domain controller, DNS, RAS
Two XP Pro SP2 laptop clients

Network:
SBC DSL five "sticky" IPs
D-Link 604 router. Has the modem wan static ip. VPN Passthrough enabled and PPTP port forwarded to internal IP of server on port 1723.

VPN setup:
two nics, one WAN/internet the other internal network for VPN client access.
range of IP addresses available for VPN clients.

I have successfully connected via VPN a couple of times but then, for apparently no reason, I am unable to connect.. stops on "Verifying username and password". I have a test environment that has functioned flawlessly and have compared the two. The only difference I have noticed is the DHCP relay agent. The environment that fails, the internal interface shows relay mode as unknown and when looing under IP Routing->General, IP Address:Not available, Administrative Status:Unknown, Operational status:Non-operational. Just the oppisite on the working test environment where IP Address:shows range of IPs I assigned, Administrative Status:enbabled, Operational statusperational.

I have removed the internal interface and re-added it to no avail. I have also removed and re-insatlled RAS a couple of times.

Please let me know if this is the problem and how to fix it.

Matt

 

[mrbnet]

Does the WAN nic have an Internet IP or is it behind a NAT?

 

[mgriss]

both nics are behind the NAT of my d-Link router. Also, PPTP port 1723 and PPTP,GRE protocol 47 are cleared through firewall of router.

 

[mrbnet]

Can you VPN into the server from the local network or does that hang also

 

[mgriss]

I connected VPN from the server without any problems. Also connected VPN from a client on the local network without any problems.

 

[mrbnet]

I still believe that the problem lies in the router. What type of routher is it?

 

[mgriss]

I guess it was the router. PPTP is a querky little protocol. Removing the internal adapter and re-installing RAS really did not appear to have an affect.

I removed the d-link router and placed a Netopia router. Opened PPTP and port 1723 and it seems to be working fine now.