VPN did not work after switch to T1 line

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VPN did not work immediately after switching to T1 line

Q1: I have been struggling with this for a bit now and I cannot figure it out. Last week I changed from DSL to T1. I went from using a modem/router to using just a router. This also included an IP Address change. VPN did not work immediately after the switch. I found a reference to the old IP address in the routing policy, so I changed that. This did not, however, solve the problem. I removed all restrictions including placing the server in a DMZ to no avail. I have had a long tech call with the router people and they have indicated that it is the server. The only thing that I have noticed that may shed light on the subject is the iaslog file entry for starting RAS. It looks as though there is a login entry before the change and now there is a blank where the login would occur….

I am running out of ideas with the issue. Any help would be greatly appreciated

A1: Assuming you use PPTP VPN, what's the error code? or any errors in the event Viewer?

Bob Lin, MS-MVP, MCSE & CNE
Networking, Internet, Routing, VPN Troubleshooting on http://www.ChicagoTech.net
How to Setup Windows, Network, VPN & Remote Access on http://www.HowToNetworking.com

Q2: PPP

The error code is 628.

A2: In this case, I would check the new router or firmware first.

VPN error code VPN Error Codes · System Error Codes · Windows Event ID · Internal Errors. Case Studies ... Receiving VPN error 619 while connecting to a VPN via SBC ...
www.chicagotech.net/vpnerrors.htm

Q3: It did turn out to be the router. I switched it out with another and there
was no problem. I had talked to the router company, but there must have been
some part of the configuration that was not right. Thanks!

A3: Thank you for the feedback.

Bob Lin, MS-MVP, MCSE & CNE
Networking, Internet, Routing, VPN Troubleshooting on http://www.ChicagoTech.net
How to Setup Windows, Network, VPN & Remote Access on http://www.HowToNetworking.com