Looking for a working example of sshd_config setup fille

[Peter Flynn]

On 18/08/2025 15:44, Robert Heller wrote:
[...]
> Are either machine running some sort of local firewall?

No.

> Are you certain that sshd is enabled and running on the target machine(s)?

I assume so: I can log into any machine from any other with ssh, and 
copy files with scp, with normal username/password credentials.

> Default port (22) or some other port? 

22

> What does "sudo systemctl status sshd" tell you?

Weirdly, it reports "Unit sshd.service could not be found."
I am surprised because I would have assumed that there needed to be some 
service enabled for it to work.

> What ports (if any) are open on your router?  Ideally, there should
> be NO open ports on the WAN side of your router.  

None. No requirement for.

> If no ports are open on your router's firewall and if your WiFi is
> properly secured, then it is unlikely that an external agent
> penetrated your systems.
Right. I'm fairly sure of that; there have never been any signs of 
unusual activity.

But my question was, in the light of RSA being deprecated, what should I 
be doing instead, given that a completely fresh as-new installation does 
not permit between-systems ssh/scp.

Peter