[toc] 强迫自己看 iptables 的文档. 翻的很烂, 自己明白就行. Name iptables - administration tool for IPv4 packet filtering and NAT iptables - IPv4 包过滤和 NAT 的管理工具 Synopsis 简介 1 2 3 4 5 6 7 8 9 iptables [-t table] -[AD] chain rule-specification [options] iptables [-t table] -I