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I set up an internet lab with GNS3, which has 3 routers, in each node there is a computer directly connected.

One of the hosts is a DNS server, Windows 2003 Server. The other one is a Windows XP machine.

Ping is good between routers and machines but no ability to ping domain.com record on DNS server 2003.

I set a static nat on the router to route all traffic from gateway to the DNS server internal ip address, still no answer for the dns request.

Any ideas or thoughts will be most welcome.

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Is there a firewall enabled? Check windows firewall, and if you have Norton security it sometimes has one as well. –  Bachtron Sep 7 '12 at 0:37
Can you resolve the domain.com record if you try from the Windows 2003 server? Are you sure that you have configured the DNS resolver information correctly in Windows XP? –  Mike Pennington Sep 7 '12 at 2:12
Thanks. Hi, Yes I turned off all firewall and antivirus. On 2003 I did nslookup and all records were ok. also on the XP machine I put the router external address before the DNS server 2003 machine. Any isead? –  Eldad Cohen Sep 7 '12 at 4:28

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