[Bug 1687482] Re: -4 flag doesn't work

Colin Watson cjwatson at canonical.com
Tue May 2 23:01:52 UTC 2017


I'd suggest using "ssh -v" rather than relying on the "Last login:"
output.  For instance:

  $ ssh -v -Snone riva : 2>&1 | grep 'Connecting to'
  debug1: Connecting to riva.pelham.vpn.ucam.org [2001:8b0:bff2:eb14:6a05:caff:fe12:71bf] port 22.
  $ ssh -4v -Snone riva : 2>&1 | grep 'Connecting to'
  debug1: Connecting to riva.pelham.vpn.ucam.org [172.20.153.17] port 22.

The client in this case is on xenial, so I know that "ssh -4" is not
fundamentally broken on xenial.  You might also like to check that
there's nothing relevant in your ~/.ssh/config that might be overriding
the normal logic.

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https://bugs.launchpad.net/bugs/1687482

Title:
  -4 flag doesn't work

Status in openssh package in Ubuntu:
  Incomplete

Bug description:
  Whenever I use the -4 flag on ssh, it still uses the ipv6 address from
  dns instead of forcing ipv4 like it says it is supposed to do in the
  man page.

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