port-forwarding-iptables

 sudo yum install iptables-services
   sudo systemctl mask firewalld.service
   sudo systemctl enable iptables.service
   
   # Optional:
   # systemctl enable ip6tables.service
   # Optional: youmay have 80 -> 8080 redirects. if so, -D (delete) them first:
   sudo /sbin/iptables -t nat -D OUTPUT -o lo -p tcp --dport 80 -j REDIRECT --to-port 8080
   sudo /sbin/iptables -t nat -D PREROUTING -p tcp --dport 80 -j REDIRECT --to-port 8080
   
   sudo /sbin/iptables -t nat -I PREROUTING -p tcp --dport 80 -j REDIRECT --to-port 8180
   sudo /sbin/iptables -t nat -I OUTPUT -o lo -p tcp --dport 80 -j REDIRECT --to-port 8180
   sudo service iptables save