DNS Resolving in the Wrong Order.

  • Thread starter Thread starter Jared Brodsky
  • Start date Start date
J

Jared Brodsky

Here is my bizarre issue. I have a user working remotely over VPN.
The user sits behind a Netopia DSL gateway running it NAT mode.
The VPN client in use is the Windows XP PPTP client with split tunneling
disabled passing all traffic over through the VPN.
I have manually configured the DNS in the TCP/IP settings to use my two
local DNS servers on the remote LAN.
Here is what happens.
The user needs to connect to a host in our office. The host is our exchange
server. The hostname is gtn-ex1 which has an internal ip of 10.1.1.* as
well as an external public ip for mail delivery.
however, when pinging the host while connected to the VPN it only returns
the External IP address.
When doing an nslookup on the servers IP address I get the following
response.
*** Can't find server name for address 192.168.1.254: Non-existent domain
Server: gtn-dc1.greatertalent.com
Address: 10.1.1.*

Name: gtn-ex1.greatertalent.com
Addresses: 10.1.1.*, 10.1.1.*

Now the host gtn-ex1 has an A record locally pointing to the server IP
address.
Here is the part that is confusing me. It seems as if the PC is attempting
to contact the local DNS server that of the ISP (Bellsouth) before it
connects to the ones I have designated. Which is why when trying to connect
to the host it always returns the external IP address.

Some of the things I have tried are as follows
ipconfig /release
ipconfig /renew
ipconfig /flushdns
ipconfig /registerdns
I have checked the hosts file >everything looks good.
I have also gone under advanced configuration in network settings and
changed the order that adapters are being bound.

help!!!!
 
The DNS setting on the machine is Global,..no matter what Nic it is on. The
Bellsouth DNS is probably configured on another Interface. Regular nics are
always higher in the binding order that "Dialup Adapters" (VPN is considered
"Dialup").

--
Phillip Windell [MCP, MVP, CCNA]
www.wandtv.com
-----------------------------------------------------
Understanding the ISA 2004 Access Rule Processing
http://www.isaserver.org/articles/ISA2004_AccessRules.html

Microsoft Internet Security & Acceleration Server: Guidance
http://www.microsoft.com/isaserver/techinfo/Guidance/2004.asp
http://www.microsoft.com/isaserver/techinfo/Guidance/2000.asp

Microsoft Internet Security & Acceleration Server: Partners
http://www.microsoft.com/isaserver/partners/default.asp
 
Fix the reverse zones.
When Nslookup.exe starts, it does a reverse lookup to get the name of the
default server. If no PTR data exists, the error message *** Can't find
server name for address w.x.y.z: Non-existent domain* is returned. To
correct make sure that a reverse lookup zone exists and contains PTR records
for the name servers.

What does *ping -a (internal Exch address)* return?
 
Jetro said:
Fix the reverse zones.
When Nslookup.exe starts, it does a reverse lookup to get the name of the
default server. If no PTR data exists, the error message *** Can't find
server name for address w.x.y.z: Non-existent domain* is returned. To
correct make sure that a reverse lookup zone exists and contains PTR records
for the name servers.

What does *ping -a (internal Exch address)* return?
Click to expand...

i will give that a shot and see what comes up.
 
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