Bug#873884: [openssh-server] At boot time ssh is listening at port 22 rather than the one configured in sshd_config

["W. Martin Borgert" <debacle@debian.org>]

Hi Colin,

thanks for your explanation! However, the bug submitter seems to like
sshd *not* to listen on port 22, which is what I want, too. (Mainly to
prevent log spamming due to failed login attempts.)

Your explanation here seems to *add* a second listening port, which is
probably not what the bug submitter — nor I — wanted.  I assume, that
the old README.Debian was correct, because it overrode the default.

To achieve the desired result, the following works for me:

systemctl start ssh.service
systemctl enable ssh.service
systemctl stop ssh.socket
systemctl disable ssh.socket

Now, only the configured ports from /etc/ssh/sshd_config are used.

Should this be added to README.Debian, maybe?

I wonder, why sshd suddenly used socket activation by systemd instead
of the standalone service? I can't remember that I changed that on my
system and the effect of listening on a different port than before was
highly confusing until reading this bug report. If this were something
intended by the package, it should be probably mentioned in
NEWS.Debian.

Cheers, Martin