?
Solved

No Name Resolution (NetBios or DNS) over PPTP VPN

Posted on 2003-03-24
4
Medium Priority
?
6,232 Views
Last Modified: 2008-03-10
Hi all,

I cannot resolve host names over my Windows 2000 Server PPTP VPN connection.

I can ping all hosts by IP Address, but pings by netbios hostname and FQDN's fail.

I can connect to the PPTP Server by hostname and access it's resources, however, I cannot connect to other nodes on the network by hostname.

Server OS is Windows 2000 Server SP3, All Network Clients are Windows XP.

Server is the DC running DHCP, DNS, WINS, RRAS and is also the primary file server.

I have a reverse lookup zone specified in DNS for 192.168.0.x

VPN is allocating IP Addresses to clients using DHCP, which has been configured to dish out the IP address of the server for WINS and DNS

Server is behind a Linksys Router. Router is configured to port forward 1723 (PPTP) to the PPTP Server. I assume I'm correct in saying that there should not have to be any other ports open - the PPTP should be all that is needed.

DNS functions as expected on the network - it's only causing problems over the VPN.

I'm hedging my bets on this being a configuration issue relating to DNS (hey, Microsoft recently said that 70% of AD problems were related to DNS).

This is the only server in the network.

DNS is running in AD Integrated mode.

From a client connected over the vpn, an nslookup of any node on the remote network results in a "non-existent domain" error.


Relevant info:

ipconfig /all on connected client


        Connection-specific DNS Suffix  . :
        Description . . . . . . . . . . . : WAN (PPP/SLIP) Interface
        Physical Address. . . . . . . . . : 00-53-45-00-00-00
        Dhcp Enabled. . . . . . . . . . . : No
        IP Address. . . . . . . . . . . . : 192.168.0.10
        Subnet Mask . . . . . . . . . . . : 255.255.255.255
        Default Gateway . . . . . . . . . :
        DNS Servers . . . . . . . . . . . : 192.168.0.2
        Primary WINS Server . . . . . . . : 192.168.0.2

Default Gateway is blank here because I have chosen to untick the "use default gateway on remote network" checkbox under the advanced properties of the VPN. (interesting aside - even with this selected, I cannot ping websites, but I can still use IM and pickup email - DNS must be routing something bizarrely here)

nslookup gibbsdc (PPTP server - main server)

*** Can't find server name for address 192.168.0.1: Non-existent domain
*** Can't find server name for address 192.168.0.2: No response from server
*** Default servers are not available
Server:  UnKnown
Address:  192.168.0.1

*** UnKnown can't find gibbsdc: Non-existent domain

So, I believe the technical term is buggered.

Any thoughts or suggestions? Can't think of any other salient facts to help you out further at this stage
0
Comment
Question by:EdGillett
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
  • 2
4 Comments
 
LVL 79

Expert Comment

by:lrmoore
ID: 8200075
So it works better with the box checked to 'use default gateway on remote network'?
What is your local LAN ip subnet without the VPN? Is it also 192.168.0.x perchance?
0
 

Author Comment

by:EdGillett
ID: 8201521
Yes - Without VPN it is also 192.168.0.x

Actually, it doesn't work better with the box checked to "use default gateway on remote network" - but I can still use IM on the VPN'd client (although I can't ping websites ... it's routing something very bizarre I think?)
0
 
LVL 79

Accepted Solution

by:
lrmoore earned 300 total points
ID: 8209812
You're local LAN should be something other than the same as the remote LAN, or the subnet you get from the VPN client.
Try changing your local lan to something different, like 192.168.22.x
0
 

Author Comment

by:EdGillett
ID: 8217556
Having changed my local LAN to be in the 192.168.10.x range, I now have a working VPN.

I had read that elsewhere, but did not apply it for some reason.

It makes sense of course, but I was under the impression that the VPN somehow corrected for connections to the same range? Evidently not.

Anywho, our resident expert lrmoore gets the points for being right on the money.

It's always something simple ...

Thanks.
0

Featured Post

On Demand Webinar: Networking for the Cloud Era

Did you know SD-WANs can improve network connectivity? Check out this webinar to learn how an SD-WAN simplified, one-click tool can help you migrate and manage data in the cloud.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Preface Having the need * to contact many different companies with different infrastructures * do remote maintenance in their network required us to implement a more flexible routing solution. As RAS, PPTP, L2TP and VPN Client connections are no…
When you connect to your workplace's VPN, you may not notice that you are using your workplace's servers to serve up webpages.  This might be undesirable since the workplace can log all the places you've been.  It also might be very slow to load pag…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
Windows 10 is mostly good. However the one thing that annoys me is how many clicks you have to do to dial a VPN connection. You have to go to settings from the start menu, (2 clicks), Network and Internet (1 click), Click VPN (another click) then fi…
Suggested Courses

770 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question