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VPN - using wrong DNS server

Posted on 2009-02-13
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Last Modified: 2012-05-06
Hi,

we have the following problem
Client (XP) connects to VPN. The PPTP device gets the correct IP adress and dns server entries.
When I try to make a nslookup then I does not get the answer from the DNS provided by the VPN I get it from the local router.
Any idea?

Here is the Ip configuration and the result from nslookup i get when i am connected to VPN:

        WINS-Proxy aktiviert. . . . . . . : Nein
        DNS-Suffixsuchliste . . . . . . . : xxxx.eu
                                           

Ethernetadapter Local Area Connection:

        Medienstatus. . . . . . . . . . . : Es besteht keine Verbindung
        Beschreibung. . . . . . . . . . . : Broadcom NetXtreme 57xx Gigabit Con
roller
        Physikalische Adresse . . . . . . : 00-1C-23-0C-33-88

Ethernetadapter Wireless Network Connection:

        Verbindungsspezifisches DNS-Suffix:
        Beschreibung. . . . . . . . . . . : Dell Wireless 1390 WLAN Mini-Card
        Physikalische Adresse . . . . . . : 00-1C-26-40-D6-3F
        DHCP aktiviert. . . . . . . . . . : Ja
        Autokonfiguration aktiviert . . . : Ja
        IP-Adresse. . . . . . . . . . . . : 192.168.178.27
        Subnetzmaske. . . . . . . . . . . : 255.255.255.0
        Standardgateway . . . . . . . . . : 192.168.178.1
        DHCP-Server . . . . . . . . . . . : 192.168.178.1
        DNS-Server. . . . . . . . . . . . : 192.168.178.1
        Lease erhalten. . . . . . . . . . : Freitag, 13. Februar 2009 17:35:23
        Lease läuft ab. . . . . . . . . . : Montag, 23. Februar 2009 17:35:23

PPP-Adapter xxx.EU - With Internet Browsing:

        Verbindungsspezifisches DNS-Suffix: ddd
        Beschreibung. . . . . . . . . . . : WAN (PPP/SLIP) Interface
        Physikalische Adresse . . . . . . : 00-53-45-00-00-00
        DHCP aktiviert. . . . . . . . . . : Nein
        IP-Adresse. . . . . . . . . . . . : 172.23.30.2
        Subnetzmaske. . . . . . . . . . . : 255.255.255.255
        Standardgateway . . . . . . . . . :
        DNS-Server. . . . . . . . . . . . : 172.23.0.106
                                            172.23.0.200
        Primärer WINS-Server. . . . . . . : 172.23.0.200
        Sekundärer WINS-Server. . . . . . : 172.23.0.106

C:\Documents and Settings\kuehnep>nslookup xxxxx
Server:  fritz.box
Address:  192.168.178.1
*** xxxxx wurde von fritz.box nicht gefunden: Non-existent domain

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Question by:mullenm
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5 Comments
 
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Assisted Solution

by:tercex11
tercex11 earned 400 total points
ID: 23634816
You can try and manually set the DNS on the  PPP-Adapter to 4.2.2.2

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LVL 10

Assisted Solution

by:kyleb84
kyleb84 earned 600 total points
ID: 23640882
Control Panel->Network connections->Advanced (menu)->Advanced Settings

A list will appear, make sure the VPN is up the top...
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Author Comment

by:mullenm
ID: 23647461
I tried already to add the DNS to the PPP Adapter but it will be the same. When I add the DNS Server to the wireless adapter it is working, but that is not a solution for me.
Changin the priority in the advanced settings menu is also not working I tried it. I have the same problem when I use the LAN adapter.
I found in the internet that this is a known problem related to the provider with Generic Route Encapsulation. Do you have any other ideas?

regards
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LVL 10

Assisted Solution

by:kyleb84
kyleb84 earned 600 total points
ID: 23678003
If it's an ISP issue with GRE then use IPSEC instead...
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Accepted Solution

by:
mullenm earned 0 total points
ID: 24267796
The solution in the end was to deregister one of our Domain names externally. We were using "Outlook Anywhere" and the external DNS would return an external IP resolution to our internal clients for example.

Once the domain was removed externally the problems went away. This question can be closed.

Thanks!
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