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01-19-2007, 10:21 AM #1Web Hosting Evangelist
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Help testing Cogent DNS on a Cogent line
I am having a strange DNS issue on a Cogent circuit using Cogent DNS servers at 66.28.0.45 and 66.28.0.61. What is happening is that some domain requests will timeout the first try. Then subsequent tries will be quick with no timeouts.
I am having a very hard time getting through to Cogent that there might be an issue somewhere and I was wondering if anyone on a Cogent line using the same Cogent DNS servers could also do a test for me to and see if you can reproduce any timeouts.
How I am testing:
- Open nslookup (in linux use: nslookup -timeout=2, windows defaults to 2 seconds)
- Picking a random domain name (favorite cereal.com, movie title.com, brand name.com, random word.com)
- Repeating test for same domain if timeout occurs to see the next query resolve instantly
Here is an example of what Is happening for me:Code:[eger@womp ~]# nslookup -timeout=2 > superman.com ;; connection timed out; no servers could be reached > superman.com Server: 66.28.0.45 Address: 66.28.0.45#53 Non-authoritative answer: Name: superman.com Address: 64.12.47.7 > napaautoparts.com ;; connection timed out; no servers could be reached > napaautoparts.com Server: 66.28.0.45 Address: 66.28.0.45#53 Non-authoritative answer: Name: napaautoparts.com Address: 208.254.241.70 >
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01-19-2007, 01:48 PM #2Newbie
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- Sep 2005
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- 11
I'm not on Cogent, but I got the same results you did (timeout on first try, then ok after that)
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01-19-2007, 01:55 PM #3Local tech for Los Angeles
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Overloaded DNS servers maybe? no idea really.
I use 4.2.2.2 or 4.2.2.1
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01-19-2007, 02:23 PM #4Web Hosting Evangelist
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Originally Posted by Jeremy
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01-19-2007, 03:50 PM #5Local tech for Los Angeles
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- Panorama City, CA
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hmm i dont have a problem against 4.2.2.2 / .1
Testing against cogent i get timeouts, network problem ??