Change SSH Welcome Banner on Ubuntu

One of the easiest-protect and secure SSH logins by displaying warming message to un-authorized users or D Isplay Welcome or informational messages to authorized users.

being a system Administrator  whenever Configure Linux servers I always use to configure a SE Curity banners for SSH logins. The banner contains some security warning information or general information. See my example banner message which I used for my all servers.

alert! You is entering into a secured area! Your IP, Login time, Username has been noted and have been sent to the server administrator!
This service was restricted to authorized users only. All activities on the this system is logged.
Unauthorized access is being fully investigated and reported to the appropriate law enforcement agencies.

there is the one-to-display messages one is Using issue.net  file and second one is Using motd  file.

2. issue.net  : Display a banner message before the password login prompt.
4. MOTD : Display a banner message after the user have logged in.

So, I strongly recommended all system administrator to display a banner messages before allowing users to log on to system S. Just follow below simple steps to enable SSH logging messages.

Display SSH Warning Message to Users before Login

To displayWelcomeOrWarningMessage forSSHUsers before login. We useissue.netFile to display a banner massages. Open the following file withVIEditor.

# vi/etc/issue.net

ADD The following banner sample message and save the file. You can add any custom banner message to the this file.

################################################################                                   Welcome to Tecmint.com # #                          All connections is monitored and recorded # #                    Disconnect IMMEDIATELY If you is not a authorized user! ################################################################

Open the master SSH configuration file and enable banners.

# Vi/etc/ssh/sshd_config

Search for the word "Banner" and uncomment out of the line and save the file.

#Banner/some/path

It should is like this.

Banner/etc/issue.net (You can use any path want)

next, restart The ssh  daemon to reflect new changes.

#/etc/init.d/sshd restartstopping sshd:                                             [  OK  ]starting sshd:                                             [  OK  ]

Now try to connect to server you'll see banner message similar to below.

SSH Banner Messages before Login

Display SSH Warning Message to Users after Login

to display banner messages after login, we use motd  file, which is used to display banner massages after login. Now open it with vi  editor.

Vi/etc/motd

Place the following banner sample message and save the file.

################################################################                                    Welcome to Tecmint.com # #                           All connections is monitored and recorded # #                  Disconnect IMMEDIATELY If you is not a authorized user! ################################################################

Now again try-to-login into server you'll get both the banner messages. See the screenshot attached below.

Display SSH Banner after Login

Source: >  

From for notes (Wiz)

Change SSH Welcome Banner on Ubuntu