apt-get & ipv6

[Karl Auer]

On Wed, 2011-11-02 at 06:38 +0000, Dave Henley wrote:
> Whenever I update my system using apt-get Ubuntu tries to resolve via
> IPv6 first. Since I don`t have IPv6 running yet it doesn`t work. I`d
> like apt-get to try IPv4 first before switching to IPv6.

Getting significant delays because of IPv6 resolution is usually a sign
of a misconfigured nameserver. However, if you really want to, there is
a hard way and an easy way.

The hard way is to edit gai.conf so that IPv4 is preferred over IPv6. I
leave that to you to figure out, but basically you want to make the
preference value for IPv4 larger than the preference value for IPv6.

The easy way (if you really REALLY don't have IPv6, not even via a
tunnel or suchlike) is to disable IPv6:

   sysctl -w net.ipv6.conf.eth0.disable_ipv6=1

If that does the trick, you may want to make the change permanent by
adding this line to the end of /etc/sysctl.conf

   net.ipv6.conf.eth0.disable_ipv6=1

Since you *will* have to deal with IPv6 soon, like it or not, make sure
you remember you have done this. Otherwise you will spend many unhappy
hours trying to figure out why nothing works.

Regards, K.
 
-- 
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Karl Auer (kauer at biplane.com.au)                   +61-2-64957160 (h)
http://www.biplane.com.au/kauer/                   +61-428-957160 (mob)

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