Securing SSH
Restricting and properly configuring SSH access is an essential step in securing your server.
You can find the SSH configuration file at /etc/ssh/sshd_config
To edit this file, you will need to log into your server as the root user. Once you have logged into your normal user account via SSH, you can become the root user by using the su command. For example:
user@example.com [~]# su -
Password:
root@host [~]#
Password:
root@host [~]#
Editing the SSH Configuration File
To change specific parameters within sshd_config, you need to uncomment the line by removing the number-sign (#) and changing the value for the line. For example, the default SSH port appears in a line like this:
#Port 22
To change the SSH port to 456, you will need to make the line appear like this:
Port 456
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