Port Forwarding

  1. For CentOS 7.X, run the following command and reboot the server: 
    systemctl start firewalld
firewall-cmd --zone=public --add-masquerade --permanent
firewall-cmd --zone=public --add-rich-rule='rule
family="ipv4" source address="0.0.0.0/0" accept' --permanent
firewall-cmd --zone=public
--add-forward-port=port=443:proto=tcp:toport=5004
--permanent
firewall-cmd --reload
  2. For CentOS 6.X, add the following line in the /etc/rc.local file: 
    iptables -A INPUT -i eth0 -p tcp --dport 443 -j ACCEPT
iptables -A INPUT -i eth0 -p tcp --dport 5004 -j ACCEPT
iptables -A PREROUTING -t nat -i eth0 -p tcp --dport 443 -j REDIRECT --to-port 5004
  3. Execute the following commands and reboot the server: 
    
# chmod +x /etc/rc.local
# iptables -t nat -L