Deal with SSH (changing port) from 22

1. cp -p /etc/ssh/sshd_config /etc/ssh/sshd_config.orig.$(date +%F)
   exisiting rule backup
   
    
2.  nano /etc/ssh/sshd_config
   #
   Port 269
   #AddressFamily any
   
    
3. The configuration file for the sshd daemon.
   systemctl restart sshd
   
    
4.    firewall-cmd --permanent --zone=public --add-port=269/tcp
   Open the required ports
    
5.    firewall-cmd --reload
   reload the firewall configuration
    
6.    ss -tnlp|grep ssh
   
    
7. firewall-cmd --list-all
   public (active)
     target: default
     icmp-block-inversion: no
     interfaces: eth0 eth1
     sources:
     services: dhcpv6-client ssh
     ports: 269/tcp
     protocols:
     masquerade: no
     forward-ports:
     source-ports:
     icmp-blocks:
     rich rules:

8. systemctl restart sshd
   
   now we have to edit some more files, according the made changes

9. nano /etc/services
   ssh             22/tcp                          # The Secure Shell (SSH) Protocol
   # ssh connection was modified to different location - port №269
   ssh             22/udp                          # The Secure Shell (SSH) Protocol
   
    
10.  ls /usr/lib/firewalld/services
     cp /usr/lib/firewalld/services/ssh.xml /usr/lib/firewalld/services/ssh.xml.orig.$(date +%F)
    
     
11. nano /usr/lib/firewalld/services/ssh.xml
      <description>Secure Shell (SSH) is a protocol for logging into and executing commands on remote m$
      <port protocol="tcp" port="269"/>
    </service>
    either sed -i 's|port="22"|port="269"|' /usr/lib/firewalld/services/ssh.xml
     
12. systemctl restart sshd.service
13. netstat -tunlp |grep ssh {yum install net-tools}
14. REBOOT