Short bio: Computer Scientist, FOSS supporter (read more)
Tux Machines (TM)-specific
I thought I would outline a few quick tips on securing an ssh host machine. One of the biggest security problems and security log notices that I find are automated connection attempts via the ssh port of a machine. Based on this there are a few things that I suggest in helping secure your ssh port and your machine security.
One of the first steps to increasing the security of your machine is to change the default port for ssh. This can be done by editing the /etc/ssh/sshd_config file.
sudo vim /etc/ssh/sshd_config
Look for the line that defines the port.