Date: Sun, 12 May 2002 10:53:57 +0200 From: Bernd Walter <ticso@cicely5.cicely.de> To: Peter Haight <peterh@sapros.com> Cc: hackers@FreeBSD.ORG Subject: Re: gethostbyname2 and AF_INET6 Message-ID: <20020512085356.GI30437@cicely5.cicely.de> In-Reply-To: <200205112253.g4BMrVUn041734@wartch.sapros.com> References: <200205112253.g4BMrVUn041734@wartch.sapros.com>
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On Sat, May 11, 2002 at 03:53:31PM -0700, Peter Haight wrote: > > Recently mozilla has been really slow resolving some DNS queries. I tracked > this down to a call to gethostbyname2. For some addresses (e.g. > 'www.vanguard.com'), gethostbyname2 with AF_INET6 will fail and takes more > than a minute. I verified this with my own short program that does nothing > but call gethostbyname2. > > I've attached a tcpdump of two DNS lookups. One is against > 'www.vanguard.com' which takes about a minute and thirty seconds to come > back with an 'Host name lookup failure'. > > The second log is against 'www.google.com' and it returns almost immediately > with 'No address associated with name'. > > Can someone explain to me what's going on? 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. -- B.Walter COSMO-Project http://www.cosmo-project.de ticso@cicely.de Usergroup info@cosmo-project.de To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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