Re: [squid-users] DNS not resolving for one name

 On Mon, 21 Nov 2011 13:11:11 -0600, Alan Lehman wrote:
> I'm having trouble with Squid not resolving "eldo.us" or
> "www.eldo.us"
>
> The browser reports :
> Unable to determine IP address from host name www.eldo.us
> The DNS server returned:
> Server Failure: The name server was unable to process this query.

 In command line tests this displays as "SERVFAIL" from the DNS server.

>
> /etc/resolv.conf points to the local IP and to a dns server on
> another
> system on our network.
> nslookup on both DNS servers works properly.
>
> I've tried restarting squid and bind, but no change.
>
> squid-3.1.6
> bind-9.3.6
>
> Any ideas would be most appreciated.
>

 Interesting combo there. An IPv4-only domain being serviced by a CDN
 with IPv6 nameservers.

 Maybe 3.1.16 will help. There are a lot of stack changes later in the
 3.1 series.

 For testing, ensure that you have tried AAAA record lookups in your DNS
 servers. Which is what Squid will be doing. Somehow one of them is
 presenting Squid with SERVFAIL responses instead of NXDOMAIN (on the
 AAAA lookup) or a usable IP (on the A lookup).

 Amos
Received on Mon Nov 21 2011 - 23:11:34 MST