[Dnsmasq-discuss] Problems using 'split horizon' approach

Simon Kelley simon at thekelleys.org.uk
Thu Aug 4 17:35:36 BST 2005


Dave Ewart wrote:

>>The workaround is to add the CNAME to /etc/hosts on the dnsmasq machine, 
>>so that it gets answered locally.
> 
> 
> Well, I don't *think* that's happening, since there are no
> publically-defined CNAMEs which don't also exist in /etc/hosts. 

In that case I'm bewildered.

> I've
> restarted dnsmasq, which clears the 'contamination' and have started
> tcpdump on port 53 with a shed load of verbosity, so hopefully I can
> find out what requests are making this happen.

That would be valuable information.

It might be work turning on query-logging in dnsmasq too, and sending 
the dnsmasq process SIGUSR1 after it becomes confused. That will 
generate a dump of the contents of the cache.

Cheers

Simon.



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