On Wed, Nov 18, 2009 at 09:40:03PM +0000, Pedro Ribeiro wrote: > Package: libc6 > Version: 2.10.1-7 > Severity: important > > When using Firefox, Google Chrome, Opera, Synaptic and other applications > which use DNS, I always have to wait a long time (2 to 10 seconds) for a host > to resolve (i.e. messages like "Resolving host", "Looking up > http://whatever", etc). > > I always thought that this was a problem of my internet connection. > I could never track the origin of it until finally like 2 hours ago I > stumbled across this: > https://bugs.launchpad.net/ubuntu/+source/glibc/+bug/417757 > > To test if I had this problem, I opened up Firefox and got to about:config, > entered ipv6 and set "network.dns.disableIPv6" to false. Immediately, every > DNS query was extremely fast and browsing was up to par to my high speed > internet connection. > To do a definite test, I added "ipv6_disable=1" to my kernel command line and > after that all the applications above were having much faster DNS queries. > > This is a rather serious bug that I have been experiencing ever since > upgrading to testing (right after lenny's release), and always blamed on my > ISP/wireless connection/configuration/etc, while finding it strange that > every Mac or Windows PC near me using the same connection appeared to be much > faster on DNS queries. > > I guess there must be much more users affected by this and like me, they have > no clue why. > > It may be caused by a recent version of libc6, because the bug above is > marked as "karmic regression" (the latest ubuntu is the karmic one, 9.10) and > a friend of mine who is using lenny doesn't appear to have the same problem. > > Pardon me if this as already been reported, I searched around but could not > find a Debian version of this bug. >
Does adding "options single-request" to /etc/resolv.conf fixes your problems? If so, it is due to a broken DNS server on your ISP side, and a bug in Firefox and other application which explicitely ask to resolve IPv6 adresses by not passing AI_ADDRCONFIG to getaddrinfo(). -- Aurelien Jarno GPG: 1024D/F1BCDB73 aurel...@aurel32.net http://www.aurel32.net -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org