[Bug 24828] Re: IPv6 should be disabled by default

[Thomas Butter]

> Link local addresses aren't limited to just "link diagnostics", also
> when using avahi/zeroconf, you may well have dns for just the local link.

I am no avahi expert so I could be wrong. I think avahi/zeroconf only
uses the dns protocol, but won't use the glibc name resolution functions
with link local addresses. So this use case won't affect the Vista/OS X
like name resolution.

The relevant changes in glibc 2.5 are address sorting related. I don't think
it allows disabling AAAA queries in gai.conf

>From glibc NEWS:

* For Linux, the sorting of addresses returned by getaddrinfo now also
  handles rules 3, 4, and 7 from RFC 3484.  I.e., all rules are handled.
  Implemented by Ulrich Drepper.

* Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
  Implemented by Ulrich Drepper.

gai.conf man page:

http://www.die.net/doc/linux/man/man5/gai.conf.5.html

-- 
IPv6 should be disabled by default
https://bugs.launchpad.net/bugs/24828
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