[Bug 1271183] Re: ipv6 host key not added with non-default port

[nytral]

Thanks for the thorough investigation. Simply removing the IPv4 entry
and connecting with v6 does the trick! And no need to drop interfaces,
just using -4 works for me. It's still a bug though (different behavior
depending on v4/v6), will it be pushed upstream?

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Title:
  ipv6 host key not added with non-default port

Status in “openssh” package in Ubuntu:
  Confirmed

Bug description:
  An ipv6 server key is not being added to list of known hosts if its port is non-standard:
  ssh -p 1234 somehost
  ECDSA host key for IP address '2605:2a00:ffff:fffxxx' not in list of known hosts.
  <snip>
  ssh -p 1234 somehost
  ECDSA host key for IP address '2605:2a00:ffff:fffxxx' not in list of known hosts.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: openssh-client 1:5.9p1-5ubuntu1.1
  ProcVersionSignature: Ubuntu 3.8.0-35.50~precise1-generic 3.8.13.13
  Uname: Linux 3.8.0-35-generic x86_64
  ApportVersion: 2.0.1-0ubuntu17.6
  Architecture: amd64
  Date: Tue Jan 21 15:01:13 2014
  InstallationMedia: Ubuntu-Server 11.10 "Oneiric Ocelot" - Release amd64 (20111011)
  MarkForUpload: True
  ProcEnviron:
   TERM=screen-bce
   PATH=(custom, no user)
   LANG=fr_FR
   SHELL=/usr/bin/zsh
  RelatedPackageVersions:
   ssh-askpass       N/A
   libpam-ssh        N/A
   keychain          N/A
   ssh-askpass-gnome N/A
  SSHClientVersion: OpenSSH_5.9p1 Debian-5ubuntu1.1, OpenSSL 1.0.1 14 Mar 2012
  SourcePackage: openssh
  UpgradeStatus: Upgraded to precise on 2013-02-24 (331 days ago)
  modified.conffile..etc.ssh.ssh.config: [modified]
  mtime.conffile..etc.ssh.ssh.config: 2012-02-26T19:33:27

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