Dropped connection...what changed?

[dtauernew]

I just returned to my home office from a business trip, and now
every 2 minutes my VPN connection drops. Here's what I've tried:

Called cable company to check function of line - they don't see any
problems.
Changed network cables - no change, still drops at 2 minutes.
Tried a wireless connection on the same network - no change, still
drops at 2 minutes.
Put a new laptop on the network and connected to same VPN, this new PC
stays connected without issue.
Tried a different customer VPN, still drops on problem PC, stays
connected on other PC.
Bypassed router by connecting directly to cable modem, no change,
still drops.
Gave the problem PC a static IP in the router, no change.

Everything worked fine as of Sunday night. I was at a customers
site all week connected internally to their network with no issues.
Back on my PC yesterday and my VPN connection drops every 2 minutes
on this machine, connecting to the same network that I was connected
to internally during the week. Because of the steps I tried, the
problem seems to be specific to this "problem pc".
IBM ThinkPad, T60P, XP professional, using IBM ThinkVantage access
connections.

Any ideas?

Thanks,
Darren

 

[Robert L [MVP - Networking]]

MS may have a hotfix for that. This search result may help,

VPN connection is disconnected after several minutesVPN connection is disconnected after several minutes. We have been seeing more and more cases like this one. We don't really know the causes, ...
http://www.chicagotech.net/VPN/vpn3minutes.htm


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
I just returned to my home office from a business trip, and now
every 2 minutes my VPN connection drops. Here's what I've tried:

Called cable company to check function of line - they don't see any
problems.
Changed network cables - no change, still drops at 2 minutes.
Tried a wireless connection on the same network - no change, still
drops at 2 minutes.
Put a new laptop on the network and connected to same VPN, this new PC
stays connected without issue.
Tried a different customer VPN, still drops on problem PC, stays
connected on other PC.
Bypassed router by connecting directly to cable modem, no change,
still drops.
Gave the problem PC a static IP in the router, no change.

Everything worked fine as of Sunday night. I was at a customers
site all week connected internally to their network with no issues.
Back on my PC yesterday and my VPN connection drops every 2 minutes
on this machine, connecting to the same network that I was connected
to internally during the week. Because of the steps I tried, the
problem seems to be specific to this "problem pc".
IBM ThinkPad, T60P, XP professional, using IBM ThinkVantage access
connections.

Any ideas?

Thanks,
Darren

 

[dtauernew]

MS may have a hotfix for that. This search result may help,

VPN connection is disconnected after several minutesVPN connection is disconnected after several minutes. We have been seeing more and more cases like this one. We don't really know the causes, ...
http://www.chicagotech.net/VPN/vpn3minutes.htm

Bob Lin, MS-MVP, MCSE & CNE
Networking, Internet, Routing, VPN Troubleshooting onhttp://www.ChicagoTech.net

I just returned to my home office from a business trip, and now
every 2 minutes my VPN connection drops. Here's what I've tried:

Called cable company to check function of line - they don't see any
problems.
Changed network cables - no change, still drops at 2 minutes.
Tried a wireless connection on the same network - no change, still
drops at 2 minutes.
Put a new laptop on the network and connected to same VPN, this new PC
stays connected without issue.
Tried a different customer VPN, still drops on problem PC, stays
connected on other PC.
Bypassed router by connecting directly to cable modem, no change,
still drops.
Gave the problem PC a static IP in the router, no change.

Everything worked fine as of Sunday night. I was at a customers
site all week connected internally to their network with no issues.
Back on my PC yesterday and my VPN connection drops every 2 minutes
on this machine, connecting to the same network that I was connected
to internally during the week. Because of the steps I tried, the
problem seems to be specific to this "problem pc".
IBM ThinkPad, T60P, XP professional, using IBM ThinkVantage access
connections.

Any ideas?

Thanks,
Darren

Thanks for the reply.
I ended up using the ThinkVantage restore functionality which brought
it back to earlier in the day I started having trouble.
I don't know what setting was messed up, but this previous
configuration doesn't have the issue.