Problem with ssh connection : Connection refused

I have a ssh problem since the beginning, but difficult to isolate;

I access my BBB only remotely by ssh command line. It worked well
for nearly the full week and today refuses to connect :

I can ping to the BBB

PING 192.168.1.113 (192.168.1.113): 56 data bytes
64 bytes from 192.168.1.113: icmp_seq=0 ttl=64 time=1.051 ms

but if I try to login

pelvoux:~ jxl$ slogin root@192.168.1.113
ssh: connect to host 192.168.1.113 port 22: Connection refused

As I am not on site, I cannot look further on the console, but will be able
to do it within two days.

Does anybody has an idea of the problem that may occur here ?

Thanks

Jacques

You haven’t disabled any services have you? I think the dropbearkey.service is the one that needs to be running, but not 100%. Try typing in: systemctl status dropbearkey.service, and see what the status of the service is.