Here it would be a good idea to recommend/suggest that the standard ssh port 22/tcp is closed. The fewer ports left open the more secure you system is likely to be.

Reported by: skodz

https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/9/html/securing_networks/assembly_using-secure-communications-between-two-systems-with-openssh_securing-networks#annotations:7f4d4bfd-a883-4398-9a06-846806f84edc