RE: [squid-users] Issue related to using Squid 3.1 or 3.29 and accessing a site that uses a recursive DNS record. (30 seconds to bring up site)

From: Duncan, Brian M. <>
Date: Thu, 11 Apr 2013 16:47:25 +0000

>One last thing to check is what happens when you query for AAAA records
>on that domain. That is the major change between 3.1 and 3.2 DNS.

>What I get is:

>## time host -t A
> has address
>0.000u 0.004s 0:00.06 0.0% 0+0k 0+0io 0pf+0w

>## time host -t AAAA
>;; connection timed out; no servers could be reached
>0.000u 0.004s 0:12.03 0.0% 0+0k 0+0io 0pf+0w

>Which indicates that dns_timeout directive in Squid can be reduced to
>workaround that server brokenness on their end to some degree.


Thanks! I missed that directive. And yes when I lowered it I was able to decrease the initial lookup time to 5 seconds if I set the directive to 5 seconds. I am wondering what tradeoff I will have, if anything else will break by lowering this too low.

Is the timeout on lookup I experience due to the internal resolver trying to do an ipv6 host name lookup?

I received similar #'s to the above when it tried for the AAAA record it took 15 seconds till it timed out.

Thanks again

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Received on Thu Apr 11 2013 - 16:47:35 MDT

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