[Bug 216847] Re: sshd will not start at boot if ListenAddress is set, because network interface is not yet up

[ChristianEhrhardt]

Since so many things changed since this - admittedly embarrassing old -
bug was reported I thought I retest it before the next LTS comes out.

I looked at the Xenial content and found stuff like:
Not only is it specified "After network.target", but on top there is /etc/network/if-up.d/openssh-server which is intended to restart openssh if later an iface comes up, there it would be able to rebind that IP.


I tested on containers first and it worked right away, setting ListenAddress and restarting.
But well in containers devices might be "up" at a different timing, but even in a KVM Guest, setting ListenAddress again it works just fine.
Mar 24 14:54:43 testxenial-ssh sshd[1293]: Server listening on 192.168.122.131 port 22.

I wondered and wanted to make sure that the test is valid, so I spawned
trusty (LTS), vivid (last reported issue) and wily

But - for me - it was working on all of them - even with several retries
it was not even racy.

Therefore I wanted to ask for a retest - at least with Xenial if possible.
Also any detail about the test environment that was used would be great - especially by the last confirmation in vivid.
Does it have to be a special network card that might initialize slowly or anything like it?

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https://bugs.launchpad.net/bugs/216847

Title:
  sshd will not start at boot if ListenAddress is set, because network
  interface is not yet up

Status in openssh package in Ubuntu:
  Confirmed

Bug description:
  Binary package hint: openssh-server

  The sshd will not start at boot if the ListenAddress option in
  /etc/ssh/sshd_config is set to an IPv4 address other then 0.0.0.0 .

  I am using Ubuntu 7.10 and the version 1:4.6p1-5ubuntu0.2 of the openssh-server package.
  I would expect that sshd is started after boot but it will not and I found this in /var/log/auth.log:

  sshd[4527]: error: Bind to port 22 on 10.1.1.22 failed: Cannot assign requested address.
  sshd[4527]: fatal: Cannot bind any address.

  Once the System is started you can start/stop the sshd with the
  /etc/init.d/ssh script without any problems.

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