將端口80映射到8080（此時監聽80端口的服務將無法接收數據，因為80端口的數據被轉發到8080端口了）
- Centos6
iptables -t nat -A PREROUTING -p tcp --dport 80 -j REDIRECT --to-ports 8080
service iptables save
service iptables restart
- Centos7
yum install iptables-services
systemctl enable iptables
iptables -t nat -A PREROUTING -p tcp --dport 80 -j REDIRECT --to-ports 8080
service iptables save
systemctl restart iptables
參考文獻：
https://blog.csdn.net/nainaiqiuwencun/article/details/80697388
https://blog.csdn.net/at99ak77/article/details/46739043
https://blog.csdn.net/c233728461/article/details/52679558