SSH Login Banner

there are 2 type of banner
1 is show before you login
and another is show after you success login

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Show before login

by default, there already prepare a banner for us but is not used.
it located at /etc/issue.net
it show the kernel version as banner at login
you can use this or use your own script
just create a file example
# vim  /etc/ssh/banner
and put something like this

#####################
#                                      #
#  Welcome to Centos 7 #
#                                     #
####################

then enable the banner
# vim /etc/ssh/sshd_config
find and edit this

# no default banner path
#Banner none

to

# no default banner path

Banner /etc/ssh/banner

then restart the sshd service

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Show after success login

# vim /etc/motd

and edit to your like