HOW TO CHANGE SSH PORT AND ENHANCE SECURITY...

First check ssh configuratio file by sudo cat /etc/ssh/sshd_config

Then edit by vim or vi /etc/ssh/sshd_config

Edit the following lines

Port 9091 #AddressFamily any #ListenAddress 0.0.0.0 #ListenAddress ::

then u can change..LoginGraceTime 1m

PermitRootLogin no

###This Line add by Santanu

AllowUsers admin

#StrictModes yes

MaxAuthTries 3Max

Sessions 6

finally allow ssh from firewall and as wall as SElinux

semanage port -a -t ssh_port_t -p tcp 9091

firewall-cmd –permanent –zone=public –add-port=9091/tcp