Centos 设置iptables端口转发 “Unit iptables.service could not be found”错误

将端口80映射到8080（此时监听80端口的服务将无法接收数据，因为80端口的数据被转发到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

参考文献：

https://blog.csdn.net/nainaiqiuwencun/article/details/80697388

https://blog.csdn.net/at99ak77/article/details/46739043

https://blog.csdn.net/c233728461/article/details/52679558