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Date:      Sun, 12 May 2002 13:16:47 -0700
From:      Peter Haight <peterh@sapros.com>
To:        Bernd Walter <ticso@cicely5.cicely.de>
Cc:        hackers@freebsd.org
Subject:   Re: gethostbyname2 and AF_INET6 
Message-ID:  <200205122016.g4CKGlUn048082@wartch.sapros.com>

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>www.vanguard.com has a broken DNS implementation.
>Find out the zone administrator via SOA record or whois and complain.
>RFC requires the behavour you saw with google.

Ok. The thing is that there are a lot of these sites. Watching the log on
the other side of my DNS server it looks like it is sending requests to
vanguard's dns server, but not getting any replies. Is there some way I can
lower the timeout for IPV6 DNS lookups or maybe disable them? Or is there
some change I can make to mozilla to minimize the impact of sites like
these?

Hmm. Looking at the FreeBSD resolver code, it doesn't look like there is
some convenient way to do this. Maybe something like, try the AAAA lookup,
but if we don't get any reply in a short timeout, try an A lookup. If we get
a reply to that, then log the site as probably not conforming to the RFC.


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