Let's start from the server opening the /etc/ssh/ssd_config file and checking the following configuration directives:
Port 22
Let's start with the port. The standard port for the SSH service is 22 , and it is at this value that most of the script kiddies around will probe your SSH daemon with some automated tools; so if you have a server publicly available, change the value to an unprivileged port such as 9527 . Thus, a lot of these attacks will simply be ineffective:
#ListenAddress ::#ListenAddress 0.0.0.0
If we need to bind the service to a specific address on our server, this is the directive we need to work on; we simply uncomment and fill in the appropriate value:
Protocol 2
We do not think to use version 1 of ...
