Open file using command
vi /etc/ssh/sshd_config
#Port 22
remove the # symbol and change the default port 22 and change it accordingly to your preference
save the file and exit
semanage port -a -t ssh_port_t -p tcp 2244 where 1234 is my ssh port
firewall-cmd --permanent --zone=public --add-port=1234/tcp
firewall-cmd --reload
systemctl restart sshd.service
Now telnet <server IP > port to make sure the ssh port is working before logging off from server