Re: [squid-users] DNS Problems

On Fri, 13 Feb 2004, Stephen J. McCracken wrote:

> Squid Cache: Version 2.5.STABLE4-20040211
>
> Could someone please give me a pointer for the following DNS problems?
>
> On startup cache.log reports:
>
> 2004/02/13 16:20:27| Starting Squid Cache version 2.5.STABLE4-20040211
> for i686-pc-linux-gnu...
> 2004/02/13 16:20:27| Process ID 25708
> 2004/02/13 16:20:27| With 32768 file descriptors available
> 2004/02/13 16:20:27| Performing DNS Tests...
> 2004/02/13 16:20:27| Successful DNS name lookup tests...
> 2004/02/13 16:20:27| DNS Socket created at 0.0.0.0, port 33116, FD 4
> 2004/02/13 16:20:27| Adding nameserver x.x.x.x from /etc/resolv.conf
> 2004/02/13 16:20:27| Adding nameserver x.x.x.x from /etc/resolv.conf
> 2004/02/13 16:20:27| helperOpenServers: Starting 6 'adzapper' processes
> 2004/02/13 16:20:28| helperOpenServers: Starting 7 'ntlm_auth' processes
>
> I try to browse somewhere and get:
>
> The following error was encountered:
>
> Unable to determine IP address from host name for www.ibm.com
> The dnsserver returned:
>
> No DNS records
>
> But on the proxy box itself get:
>
> -bash-2.05b$ host www.ibm.com
> www.ibm.com has address 129.42.20.99
> www.ibm.com has address 129.42.21.99
> www.ibm.com has address 129.42.16.99
> www.ibm.com has address 129.42.17.99
> www.ibm.com has address 129.42.18.99
> www.ibm.com has address 129.42.19.99

Thats odd indeed. It might be helpful if you can run
  # tcpdump -v -s 1500 -n port domain
while you make the HTTP request. Then we can see the contents of
the answer from your DNS server.

You might also try reconfiguring with --disable-internal-dns as a workaround.

Also note that the 2.5.STABLE4 versions after Nov 2003 have a bug
with the IP cache. I don't think it can cause the problem you're
seeing, but you might want to stick with the last official stable
release, or apply the patch given in
http://www.squid-cache.org/bugs/show_bug.cgi?id=891

Duane W.
Received on Fri Feb 13 2004 - 15:21:14 MST