<div class="gmail_quote">On Fri, Jul 3, 2009 at 6:35 PM, Tim Largy <<a href="mailto:tim.largy@gmail.com" target="_blank">tim.largy@gmail.com</a>> wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> On a freshly installed F11 machine I noticed that Firefox was taking a long time to do name resolution. Using Wireshark, I saw the resolver querying DNS twice even though it appeared to get an answer the first time. It was waiting 5 seconds before issuing the second query, which was the source of my delay in Firefox. I found a few old fedora-list threads (some from years ago) mentioning that IPv6 was causing this problem, so I disabled IPv6 name resolution in Firefox by setting network.dns.disableIPv6 to true in about:config. It solved my problem, but of course only for Firefox and not other programs. To fix it for everything I reverted the change in Firefox and disabled IPv6 by creating a file /etc/modprobe.d/disable_ipv6.conf (because I didn't know if it was a good idea to edit the other /etc/modprobe.d/*.conf files) containing this line install ipv6 /bin/true and rebooted. It worked. I'm happy about that, but I'm confused. Despite my supposed disabling of ipv6, ipv6.ko still shows up in modprobe -l. What exactly did the line above do in that case? Tim<a href="http://fedoraproject.org/wiki/Communicate/MailingListGuidelines" target="_blank"></a> </blockquote></div> meh, bump- I'm unfortunatley experiencing the same thing after doing a 'yum update' (having never done so before) after upgrading from F10->F11. My network/telnet/firefox etc. didn't exhibit the delay at all on F11 prior to the yum update however, after googling for threads about the same problem, i've found that disabling-ipv6 dosen't seem to resolve the issue for me, any one have any ideas? uname -r ==> 2.6.29.5-191.fc11.x86_64