https://docs.fedoraproject.org/en-US/Fedora/19/html/Security_Guide/sec-Configure_Port_Forwarding-CLI.html原意是买了个阿里云做shadowsocks中转骑墙，然后想了半天怎么转发，想到了iptables做nat。后来发现我用的fedora里面早就换成了firewalld，网上这通找啊，都用...