VPN connects with dial-up but not T1

[contsi]

VPN server with 1 NIC behind Dlink wireless router.
I’m finally able to connect and browse my home network using a VPN connection, but only if I dial-up to the internet via phone line, (slow). I can’t connect from my work’s T1 (error 721, the remote computer is not resnding). Also when connected via dial-up, and I check the details tab of the status page, the server and the client address is the same, and it is not the address of the server, it appears to be assigned as a virtual address, and I can ping it.
Any insight on this situation.
Thanks

 

[ChicagoTechNet]

some router may block to access out site VPN. quoted from

http://www.chicagotech.net.

Can't connect to a VPN server on the outside of the PIX

.Symptom: When attempting to connect to a VPN server on the outside of the PIX it returns error 721, the computer failed to respond.

Resolution: In order to PPTP through a PIX, you must have a one-to-one mapping from the external IP to an internal IP for type 47 GRE packets and port 1723. For example, for pptp add this: conduit permit gre host x.x.x.x any AND conduit permit tcp host x.x.x.x eq 1723. For l2tp over ipsec: conduit permit esp host x.x.x.x any, conduit permit udp host x.x.x.x eq 1701 any AND conduit permit udp host x.x.x.x eq 500 any.


Robert Lin, MS-MVP, MCSE & CNE
Windows, Network, Internet, VPN, Routing and How to at

http://www.ms-mvps.com

 

[contsi]

Thanks for the qick reply.
Can you tell me how to do this?
Thanks