Changing SSH Default Port The default port for SSH is port 22. This can easily be changed by modifying the /etc/ssh/sshd_config file. vi /etc/ssh/sshd_config Change the section that says “Port 22” to your new chosen port number. The new port number does...
There are a few different ways to block an IP address in Debian / Ubuntu. This article describes one way to block an IP address using the null routing reject command. Temporally Block An IP Address Use the following command to temporally block an IP address. To...