How to create and implement a banner for ssh connections. This is not going to alter MOTD etc., its only the banner or warning screen users see upon connection to the server.
1- nano /etc/ssh/banner.local
Remove the current content and replace with your own personal message. This is an example I grabbed from a ChatGPT convo
WARNING: Unauthorized access to this system is prohibited! All activities are logged and monitored.
2- Edit sshd_config
- nano /etc/ssh/sshd_config
- remove the # from the Banner line and change the reference to /etc/ssh/banner.local
- save and close the file
- restart sshd service
To test log out of your current ssh session and login again.