禁止所有进站/转发 允许所有出站
iptables -P INPUT DROP
iptables -P FORWARD DROP
iptables -P OUTPUT ACCEPT
允许已建立的进站 允许PING 允许本机内部环回
iptables -A INPUT -m state –state ESTABLISHED,RELATED -j ACCEPT
iptables -A INPUT -p icmp –icmp-type echo-request -j ACCEPT
iptables -A INPUT -i lo -p all -j ACCEPT
允许已建立的转发
iptables -A FORWARD -m state –state ESTABLISHED,RELATED -j ACCEPT
iptables -A FORWARD -p udp –dport 2408 -d 162.159.192.1 -j ACCEPT
iptables -t nat -A PREROUTING -p udp –dport 8443 -j DNAT –to-destination 162.159.192.1:2408
iptables -t nat -A POSTROUTING -d 162.159.192.1 -p udp –dport 2408 -j MASQUERADE
sysctl -w net.ipv4.ip_forward=1
允许进站端口
iptables -A INPUT -p tcp –dport 22 -j ACCEPT
iptables -A INPUT -p tcp –dport 80 -j ACCEPT
iptables -A INPUT -p tcp –dport 443 -j ACCEPT
iptables -A INPUT -p udp –dport 53 -j ACCEPT
iptables -A INPUT -p udp –dport 8443 -j ACCEPT
iptables -A INPUT -p udp –dport 2408 -j ACCEPT
iptables -A INPUT -p udp –dport 4000 -j ACCEPT
关键词封锁
iptables -A OUTPUT -m string –string “torrent” –algo bm –to 65535 -j DROP
iptables -A OUTPUT -m string –string “.torrent” –algo bm –to 65535 -j DROP
iptables -A OUTPUT -m string –string “peer_id=” –algo bm –to 65535 -j DROP
iptables -A OUTPUT -m string –string “announce” –algo bm –to 65535 -j DROP
iptables -A OUTPUT -m string –string “info_hash” –algo bm –to 65535 -j DROP
iptables -A OUTPUT -m string –string “get_peers” –algo bm –to 65535 -j DROP
iptables -A OUTPUT -m string –string “find_node” –algo bm –to 65535 -j DROP
iptables -A OUTPUT -m string –string “BitTorrent” –algo bm –to 65535 -j DROP
iptables -A OUTPUT -m string –string “announce_peer” –algo bm –to 65535 -j DROP
iptables -A OUTPUT -m string –string “BitTorrent protocol” –algo bm –to 65535 -j DROP
iptables -A OUTPUT -m string –string “announce.php?passkey=” –algo bm –to 65535 -j DROP
iptables -A OUTPUT -m string –string “magnet:” –algo bm –to 65535 -j DROP
iptables -A OUTPUT -m string –string “xunlei” –algo bm –to 65535 -j DROP
iptables -A OUTPUT -m string –string “sandai” –algo bm –to 65535 -j DROP
iptables -A OUTPUT -m string –string “Thunder” –algo bm –to 65535 -j DROP
iptables -A OUTPUT -m string –string “XLLiveUD” –algo bm –to 65535 -j DROP