[Dnsmasq-discuss] About 127.0.0.1 in resolv.conf [WAS: Web hang ups after repeated access to one site - dnsmasq related?]

[Simon Kelley]

Hugo Heden wrote:
> Good day all,
> 
> On Fri, Feb 13, 2009 at 3:55 PM, Chris G <cl at isbd.net> wrote:
> [snip]
>> My /etc/dnsmasq.conf file has only the following lines (apart from
>> comments):-
>>
>>    domain-needed
>>    bogus-priv
>>
>>    expand-hosts
>>    domain=isbd.net
>>    dhcp-range=192.168.1.80,192.168.1.150,1h
>>
>>    dhcp-option=3,192.168.1.1
>>
>>
>> /etc/resolv.conf is:-
>>
>>    nameserver 127.0.0.1
>>    nameserver 195.74.113.58
>>    nameserver 195.74.113.62
>>
>>
>> That's about it, pretty standard dnsmaq installation.
>>
> 
> How is this supposed to work? Does not dnsmasq (by default) use the
> nameserver-entries in /etc/resolv.conf as "upstream" nameservers, to
> forward ("non-local") dns-queries to? But what happens if dnsmasq then
> forwards a ("non-local") dns-query to 127.0.0.1, i.e to itself? Could
> that not result in some kind of infinite loop weirdness?

dnsmasq knows that it's listening on 127.0.0.1 so it's clever enough not 
  to forward requests there. (Check the logs, it will even tell you what 
it is doing.)

Cheers,

Simon.