Procedure to change OpenSSH pre login banner
1) By default sshd server turns off this feature.
2) Login as the root user; create your login banner file:
# vi /etc/ssh/sshd-bannerAppend text:
Welcome to nixCraft Remote Login!
3) Open sshd configuration file /etc/sshd/sshd_config using a text editor:
# vi /etc/sshd/sshd_config4) Add/edit the following line:
Banner /etc/ssh/sshd-banner5) Save file and restart the sshd server:
# /etc/init.d/sshd restart6) Test your new banner (from Linux or UNIX workstation or use any other ssh client):
$ ssh vivek@rh3es.nixcraft.orgOutput:
Welcome to nixCraft Labs!
vivek@ rh3es.nixcraft.org's password:
Please note that this feature may not work with third party ssh client such as Putty.