[Dnsmasq-discuss] Strange behavior when making the nameserver machine use dnsmasq

[richardvoigt at gmail.com]

>
>
> No, but it provides me with a perfect opportunity for a public service
> announcement, since this information needs to go to a wider audience.


IMHO, the best place for such information is here:
http://thekelleys.org.uk/dnsmasq/docs/dnsmasq-man.html
Much wider audience.

I think the logging has contributed to the confusion as well.  First, use of
strongly discouraged options ought to generate a warning at startup.  Next,
in a configuration with multiple DNS servers, knowing which one responded
could be pretty important but I don't see that information in the log above
(just a supposition that since the response came after the third request
that it came from the third server).  At least I'm not convinced that an
early nameserver didn't simply spend a full second doing disk I/O to check
its cache, contacting upstream nameservers, bringing up a vpn connection to
the upstream nameserver, etc.

Just my 2cents.


>
> Sorry about the shouting;
>
> DON'T USE --STRICT-ORDER
>
> Strict-order almost never does what people expect/want it to do, which is
> to put a priority order on the list of servers in /etc/resolv.conf. It
> mainly just disrupts dnsmasq's mechanism for dealing with broken or down
> servers. If I could, I'd remove it. If there is ever dnsmasq-3, it will go.
>
>
> If you remove --strict order, then dnsmasq will send the first query, in
> parallel, top all the name servers. It will note that first one which
> provides a good answer, and use just that until a query times-out, when it
> will "run the race" over all the servers again.
>
> BTW My guess  is that the behaviour difference you are seeing in how the
> queries are handled is because the repeated query from 127.0.0.1 doesn't
> have the same transaction-id as teh first query, so dnsmasq doesn't
> recognise it as a retry.
>
>
> Cheers,
>
> Simon.
>
>
>
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>
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