For legal reasons, Some people need to display a warning banner on their Linux machine before login so that a person requires to acknowledge the contents of the banner before entering the password. To do this, edit a/etc/issue.net file and fill it with the desired context.
Edit the /etc/issue.net file:
sudo nano /etc/issue.net
Here is mine banner as a sample, you can add your’s here:
######################################################### # Authorized access only! # # Disconnect IMMEDIATELY if you are not an authorized user!!! # # All actions Will be monitored and recorded # ###############################################################
Open /etc/ssh/sshd_config file:
sudo nano /etc/ssh/sshd_config
Locate the line, that contains Banner and uncomment it as given below:
Banner /etc/issue.net
Restart sshd:
sudo service sshd restart
To configure the MOTD, we need to edit /etc/motd file:
sudo nano /etc/motd
Here is mine custom MOTD that I want to show to the users after login:
################################ # If you are not authorized to access# # or use this system, disconnect now # ######################################
Now, If we try to login, it will show us the warning banner as well as MOTD after login , that we just configured:
Hope this will help you!
Src: https://rbgeek.wordpress.com/2012/08/08/how-to-update-ssh-motd-banner-in-centos-6/
