Enable Ubuntu SSH Banner

In order to address user inquiries regarding security and governance, it is required that all access to servers via SSH include usage warnings and system usage policy notices. This requirement can be implemented through a straightforward configuration.

Create a banner file. Where will name it as vinclab.banner

Sudo nano /etc/vinclab.banner

Than write your Usage Warning and System Usage Policy into it. If you have difficulties to have it below is the sample

"USAGE WARNING\n\nThis computer system is the property of Your Company Register Name and is intended for authorized use by employees and designated contractors only. Users should not expect privacy while using the company's applications, infrastructure, and services. All activities and files on this system may be monitored, recorded, copied, audited, inspected, and disclosed to authorized personnel and law enforcement. \n\nBy logging in, users consent to such monitoring and disclosure. Unauthorized or improper use of this system may lead to disciplinary action or criminal penalties. If you do not agree to these terms, please log off immediately. "

Open the sshd_config in the text editor (nano) to enable the banner configuration

sudo nano /etc/ssh/sshd_config

search for…

# Banner none

Than change it to…

Banner /etc/vinclab.banner

Save this sshd_config file and do the ssh service restart

Sudo systemctl restart ssh

You have completed to make your SSH with a Usage Warnings and System Usage Policy Notices Banner.