sshd via socket

[Jeffrey Walton]

On Sat, Oct 28, 2023 at 9:21 PM David <david at daku.org> wrote:
>
> Folks
> I'm trying a fresh install of Ubuntu 23.10, with the SSHD function
> listening to two ports via the socket method.  I'm unable to make it
> work.  There are web notes that force it to use the 'older' service
> method, but nothing about how to make the socket method work.
>
> My trial starts immediately after install of minimal Ubuntu 23.10.  I then
>   apt-get install openssh-server
>
> Access works just fine on port 22, but now I want to ad a second
> port, let's say 2222.  I set /etc/systemd/system/ssh.socket.d/listen.conf:
>    [Socket]
>    ListenStream=2222
>
> and reboot.  Port 22 works, port 2222 does not.  Where is this
> described, or what should should I be doing?

This looks relevant: <https://access.redhat.com/solutions/1166283>.

Jeff