On Thu, Nov 19, 2009 at 12:03 AM, Aurelien Jarno <aurel...@aurel32.net> wrote: > 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 >
Hi, you are right! It does solve my problem. But the strange thing is that I moved to another country in the last 2 months, but I've had this problem in my previous country also. So I guess its an application and not a DNS problem? What do you think I should do, file a bug with all the respective applications, or just wait for the Ubuntu bug to go upstream / sort itself out? For now, I disabled ipv6 (I don't need it anyway) through the modprobe blacklist. Thanks for your help. -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org