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Website fails to resolve

Hello experts!

Ok this is weird, There has been absolutly no changes on any of the servers, software or hardware before this started happening. The problem is I can't access one website, example: I type in "www.google.com" and get nothing page cannot be displayed after a min.  I can however type the ip address of the "website" and it pops up fine. I try doing an nslookup using the FQDN and I get DNS request timed out. timeout was 2 seconds. If I nslookup the ip address the name pops up just fine and correct. This problem just started happening today and does the same thing on all the computers on the network. I hooked up a laptop to a dialup and the site loaded just fine. I have tryed the website on several different connections with no problems either. If I do a tracert using the cmd prompt I get unable to resolve the target system. If I log into the firewall and do a tracert I get  Couldn't resolve host name but with the ip address the tracert works just fine on both. If I look in the dns log I can see a bunch of RCODE     2 (SERVFAIL) next to the domain name that won't work. Again if I type the ip address in the browser the website will pop up fine. This website worked fine yesterday and has always worked. Please help if you can and leave detailed intructions if possible.

Thanks!!
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cbossert
Asked:
cbossert
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3 Solutions
 
Jay_Jay70Commented:
Hi cbossert,

what kind of forwarding do you have setup?
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cbossertAuthor Commented:
We have two forwarders set up pointing to 2 of our isp's dns servers I believe.
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Jay_Jay70Commented:
if you add an ISP DNS server into a client, does the website resolve?
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cbossertAuthor Commented:
Just tryed that still nothing:(
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Jay_Jay70Commented:
is this with numerous sites or just one in particular?
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cbossertAuthor Commented:
Just one so far.
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Jay_Jay70Commented:
is it a site you host?
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cbossertAuthor Commented:
Nope.
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Jay_Jay70Commented:
hmm hmm hmm    any other useful info? this is really odd
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cbossertAuthor Commented:
I can't think of anything that could be causing this everything else is working fine. No errors in the event logs.
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Jay_Jay70Commented:
can you resolve from the server itself or errors there too
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cbossertAuthor Commented:
So far any machine I have tryed on the network does this. I have tried all the servers they do the same thing.
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Fatal_ExceptionCommented:
Might try flushing your DNS Resolver Cache and trying this again..  ipconfig /flushdns

Just a thought...
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Jay_Jay70Commented:
Evening FE, Long time no see!
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feptiasCommented:
Here's a link to a similar problem someone had recently. Turned out to be a max limit on UDP packet sizes in his router:
http://www.experts-exchange.com/Operating_Systems/Windows_Server_2003/Q_21837422.html
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cbossertAuthor Commented:
Ok after trying everything under the sun. It turns out our forwarders were pointing to old DNS servers on our T1's ISP (Bellsouth). I called them they gave me two new ip's and everything is working fine now. I still don't understand why that website was working on Monday and has always worked until yesterday. Bellsouth didn't have an answer either just to change to the new DNS servers. Thanks everyone for the help. I will split points for participation even though the answer was not found.
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Jay_Jay70Commented:
hmm ISP may have made some minor change but its certainly odd

cheers
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Fatal_ExceptionCommented:
The reason, I would suggest, is that you were resolving names that were already in the cache, and your server did not have to go out and get a new address from the ISP's dns servers..  As the cache expired, you then found that you could not resolve anymore..  At least, that is my reasoning here..  :)

anyway, glad you got it.. and thanks!

FE
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