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From: Robert Watson <rwatson@FreeBSD.org>
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Cc: current@FreeBSD.org
Subject: Re: resolver change?
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On Sun, 27 Jan 2008, Dag-Erling Sm=F8rgrav wrote:

> Robert Watson <rwatson@FreeBSD.org> writes:
>
>> A casual glance suggests no pertinent changes in that timeframe -- howev=
er,=20
>> were you just updating your kernel, or also userspace, and in particular=
,=20
>> libc?
>
> No, this is the weird thing.
>
> I'm starting to think I'm imagining it all...
>
> But this *definitely* worked correctly on January 13, and *definitely*=20
> didn't work correctly on January 21, nor does it work correctly today.
>
>> What happens if you back out getaddrinfo.c:1.86:
>
> I've been running with that version of getaddrinfo.c since long before it=
=20
> stopped working.

On the grounds that paranoia is clearly better, my suggestion at this point=
=20
would be to run tcpdump between the caching resolver and ntpd and see what =
is=20
actually going on the wire.  The name server should be rotating them in rep=
ly,=20
and it would be good to confirm that it's doing that.  It would also be goo=
d=20
to check that it's looking up what you think it's looking up, and indeed, w=
hat=20
it should be looking at.

Robert N M Watson
Computer Laboratory
University of Cambridge
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