Bug#576567: fails to fallback to IPv4 if IPv6 is unreachable

martin f krafft madduck at debian.org
Mon Apr 5 17:29:31 UTC 2010

Package: gnutls-bin
Version: 2.8.5-2
Severity: normal
File: /usr/bin/gnutls-cli
Tags: ipv6

My IPv6 route to home is currently down. OpenSSH handles this fine,

  debug1: Connecting to pulse.madduck.net [2001:41e0:ff1a::1] port 22.
  debug1: connect to address 2001:41e0:ff1a::1 port 22: Network is unreachable
  debug1: Connecting to pulse.madduck.net [] port 22.
  debug1: Connection established.

gnutls-cli does not:

  % gnutls-cli -p 443 domine.madduck.net
  Resolving 'domine.madduck.net'...
  Connecting to '2001:1620:2018:2::4d6d:8b5a:443'...
  Cannot connect to domine.madduck.net:443: Network is unreachable

It should just fall back to IPv4.

-- System Information:
Debian Release: squeeze/sid
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: i386 (i686)

Kernel: Linux 2.6.33-2-686 (SMP w/1 CPU core)
Locale: LANG=en_GB, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages gnutls-bin depends on:
ii  libc6                   2.10.2-6         Embedded GNU C Library: Shared lib
ii  libgcrypt11             1.4.5-2          LGPL Crypto library - runtime libr
ii  libgnutls26             2.8.5-2          the GNU TLS library - runtime libr
ii  libreadline6            6.1-1            GNU readline and history libraries
ii  libtasn1-3              2.4-1            Manage ASN.1 structures (runtime)
ii  zlib1g                  1: compression library - runtime

gnutls-bin recommends no packages.

gnutls-bin suggests no packages.

-- no debconf information

 .''`.   martin f. krafft <madduck at d.o>      Related projects:
: :'  :  proud Debian developer               http://debiansystem.info
`. `'`   http://people.debian.org/~madduck    http://vcs-pkg.org
  `-  Debian - when you have better things to do than fixing systems
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