Simple trick to add more security with ssh configuration.

6.    So now onwards you have to change the port as 2222 while connecting using ssh command or with putty :

 

[root@kalwa1 ~]# ssh manmohan@192.168.216.130 -p 2222
Red Hat Enterprise Linux Server release 6.2 (Santiago)
Kernel \\r on an \\m
\\d
manmohan@192.168.216.130's password:
Last login: Sun Jun 28 02:43:12 2015 from kalwa1.home.com
[manmohan@kalwa1 ~]$