Add the Message of the Day and Banner lines to the SSH config:
Edit:
/etc/ssh/sshd_config
Uncomment:
PrintMotd yes
The option PrintMotd specifies whether the ssh daemon should print the contents of the /etc/motd file when a user logs in interactively. The /etc/motd file is also known as the message of the day.
Uncomment and add path to banner like so:
# no default banner path Banner /etc/ssh/banner
Add the Message of day file:
vim /etc/motd
Paste this in the file:
Example.com VPN Server 1 This service only listens on port XXX Do NOT close this window or you will terminate the tunnel. (CTRL-C to terminate connection)
Add the Banner file:
vim /etc/ssh/banner
Paste this in the file:
Welcome to Example.com VPN Server 1
How to: CentOS Vitualmin SSH Welcome message – MOTD and Banner