VPN DNS issue -- name queries go to wrong DNS server

[foo]

Hello,


I have a laptop running Win XP SP2. I have the folowing problem:

I have a VPN set up so that I can connect to my departmental network
from home and other locations. My home connection is through an ADSL
modem/router. I also use the laptop at another office location where I
get a static IP over a T3 line.

The VPN is set up so that internet traffic goes through the internet
connection, and not through the VPN (split tunneling).

I have a DNS problem though: When I connect to the VPN (from either of
the above locations), all name queries seem to be automatically routed
to the VPN DNS server, which only knows about local names.
(I used a sniffer to verify this: when I ping, a name query for a name
appears on the PPP interface.). So, ping by ip works fine, but ping by
name fails. When not connected to the VPN, there is no problem. Also,
there is no problem with connecting to the intranet resources
(including printer).

No other user of the same VPN has this problem. I also have a second
computer, with Win 2K, that doesn't display this problem when
connecting to the VPN.

Any thoughts? I am a bit stuck. Thank you very much!
Vasilis

 

[Robert L [MVP - Networking]]

it seems to me the VPN client uses the Office DNS. To confirm that, use the nslookup to find it out.

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
Hello,


I have a laptop running Win XP SP2. I have the folowing problem:

I have a VPN set up so that I can connect to my departmental network
from home and other locations. My home connection is through an ADSL
modem/router. I also use the laptop at another office location where I
get a static IP over a T3 line.

The VPN is set up so that internet traffic goes through the internet
connection, and not through the VPN (split tunneling).

I have a DNS problem though: When I connect to the VPN (from either of
the above locations), all name queries seem to be automatically routed
to the VPN DNS server, which only knows about local names.
(I used a sniffer to verify this: when I ping, a name query for a name
appears on the PPP interface.). So, ping by ip works fine, but ping by
name fails. When not connected to the VPN, there is no problem. Also,
there is no problem with connecting to the intranet resources
(including printer).

No other user of the same VPN has this problem. I also have a second
computer, with Win 2K, that doesn't display this problem when
connecting to the VPN.

Any thoughts? I am a bit stuck. Thank you very much!
Vasilis