Red Hat Bugzilla – Bug 425994
wget should conform to RFC3484
Last modified: 2009-03-01 10:47:53 EST
Description of problem:
wget prefers IPv4 address over IPv6 one:
[gajownik@cyklop tmp]$ LANG=C wget
Resolving ftp.heanet.ie... 188.8.131.52, 2001:770:18:aa40::c101:c140
Connecting to ftp.heanet.ie|184.108.40.206|:21... connected.
Logging in as anonymous ... Logged in!
==> SYST ... done. ==> PWD ... done.
Version-Release number of selected component (if applicable):
prefer-family = IPv6
to the default /etc/wgetrc file.
Even though IPv6 is slowly advancing, changing the default will surely break
quite a few scripts where machines have an IPv6 address but the services on that
server haven't been configured for IPv6. I'm preferring to go the route of least
surprises here and keep the upstream default.
Reopening, changing title.
There's a related upstream bug:
I agree with the original poster of that bug that "prefer-family = none" should
be the default. According to RFC3484: "Well-behaved applications SHOULD iterate
through the list of addresses returned from getaddrinfo() until they find a
The comment in that bug seems to indicate that "prefer-family=none" would use
the results in the (random) order they're returned by the DNS server. That also
Oh, I think I misread it. It does look like it might be the correct thing to do,
since glibc will sort the results for us.
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