This should be a short article mentioning few options I generally change in
sshd_config and recommend that you change them too.
Change port number
I usually change port number to something random to avoid millions upon millions of failed SSH connection generated by various bots on the interwebz in my server logs:
Turn off password authentication
PermitRootLogin without-password PasswordAuthentication no
What additional tweaks do you make to your
sshd_config file in order to secure SSH?