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

[Con]

@ahasenack, I found this post (took plenty of Google foo) but it was
helpful.

For anyone else, 18.04 LTS STILL has this issue.  The following fixed
it:

After=network-online.target
Wants=network-online.target

These are in my [Unit] section at the top of
/etc/systemd/system/sshd.service

<code_paste_from_service_file>
[Unit]
Description=OpenBSD Secure Shell server
After=network-online.target auditd.service
Wants=network-online.target
ConditionPathExists=!/etc/ssh/sshd_not_to_be_run

[Service]
</code_paste_from_service_file>

I hope this is helpful to others!

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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 portable OpenSSH:
  Unknown
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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