NSLOOKUP not returning the same thing on 2 PCs?

  • Thread starter Thread starter Scott Townsend
  • Start date Start date
S

Scott Townsend

Why are these different? If I'm connecting via nslookup to a DNS server
outside the firewall it should return me the outside address. Its not, its
returning the inside.

Suggestions...
Thanks


This is the correct response from the DNS Server itself.
C:\WINDOWS\system32>nslookup
Default Server: ns1.healdsburg.net
Address: 206.13.44.2
www.eandm.com
Click to expand...
Server: ns1.healdsburg.net
Address: 206.13.44.2

Name: www.eandm.com
Address: 204.145.245.177


This is what I get from a machine inside the firewall:
C:\WINDOWS\system32>nslookup
Default Server: server-ad3.haydon-mill.com
Address: 10.22.0.72
server 206.13.44.2
Click to expand...
Default Server: ns1.healdsburg.net
Address: 206.13.44.2
www.enm.com
Click to expand...
Server: ns1.healdsburg.net
Address: 206.13.44.2

Name: www.enm.com
Address: 10.1.1.177
 
In
Scott Townsend said:
Why are these different? If I'm connecting via nslookup to a DNS
server outside the firewall it should return me the outside address.
Its not, its returning the inside.

Suggestions...
Thanks


This is the correct response from the DNS Server itself.
C:\WINDOWS\system32>nslookup
Default Server: ns1.healdsburg.net
Address: 206.13.44.2

Server: ns1.healdsburg.net
Address: 206.13.44.2

Name: www.eandm.com
Address: 204.145.245.177


This is what I get from a machine inside the firewall:
C:\WINDOWS\system32>nslookup
Default Server: server-ad3.haydon-mill.com
Address: 10.22.0.72

Default Server: ns1.healdsburg.net
Address: 206.13.44.2

Server: ns1.healdsburg.net
Address: 206.13.44.2

Name: www.enm.com
Address: 10.1.1.177
Click to expand...



This server you provided:
Server: ns1.healdsburg.net
Address: 206.13.44.2
Click to expand...
Doesn't even respond for me. It appears either the DNS server is down or a
firewall is blocking traffic. Using my own server, I get the same IP address
for both www.enm.com and www.eandm.com. This is using one of Comcast's DNS
server:
==========================
www.eandm.com
Click to expand...
Server: ns03.toresd01.pa.comcast.net
Address: 68.80.0.12

Name: www.eandm.com
Address: 204.145.245.177
www.enm.com
Click to expand...
Server: ns03.toresd01.pa.comcast.net
Address: 68.80.0.12

Name: www.enm.com
Address: 204.145.245.177
==========================



Is 206.13.44.2 your WAN IP? Is so, Ed's response will apply in your case.


--
Regards,
Ace

Please direct all replies ONLY to the Microsoft public newsgroups
so all can benefit.

This posting is provided "AS-IS" with no warranties or guarantees
and confers no rights.

Ace Fekay, MCSE 2003 & 2000, MCSA 2003 & 2000, MCSE+I, MCT, MVP
Microsoft Windows MVP - Windows Server - Directory Services

Security Is Like An Onion, It Has Layers
HAM AND EGGS: A day's work for a chicken;
A lifetime commitment for a pig.
 
Thanks all for your reply. Yes we have a PIX with the DNS Fixup on it.
Just seemed like I was able to do it before... hmmm...

206.13.44.2 <ns1.healdsburg.net> is the address of our DNS Server. You
should be able to use NSLOOKUP on it from outside our Edge router. I can
try from my SBC DSL Connection when I get home...

Thanks for the clarification and tests...

Scott<-


"Ace Fekay [MVP]"
 
In
Scott Townsend said:
Thanks all for your reply. Yes we have a PIX with the DNS Fixup on
it. Just seemed like I was able to do it before... hmmm...

206.13.44.2 <ns1.healdsburg.net> is the address of our DNS Server. You
should be able to use NSLOOKUP on it from outside our Edge router. I can
try from my SBC DSL Connection when I get home...

Thanks for the clarification and tests...

Scott<-
Click to expand...

No prob Scott!

Ace
 
ST> Why are these different?

JdeBP> Because "www.enm.com." != "www.eandm.com.".

EH> Good catch. Didn't notice that on the first read through. He
EH> should first check the same domain space prior to different ones!

MF> But they actually resolved to the same IP.

They did not in the output that Scott himself gave.

ST> Name: www.eandm.com
ST> Address: 204.145.245.177
ST> [...]
ST> Name: www.enm.com
ST> Address: 10.1.1.177
 
Back
Top