阿里的iptables，保存一份

# Generated by iptables-save v1.4.7 on Fri Apr 14 16:37:31 2017
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [10:1472]
:syn-flood - [0:0]
-A INPUT -i lo -j ACCEPT
-A INPUT -p tcp -m tcp --dport 22 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 443 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 3306 -j ACCEPT
-A INPUT -p icmp -m icmp --icmp-type 8 -j ACCEPT
-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A INPUT -s 182.149.188.30/32 -p tcp -j DROP
-A INPUT -p tcp -m tcp --tcp-flags FIN,SYN,RST,ACK SYN -j syn-flood
-A INPUT -i eth1 -p tcp -m tcp --tcp-flags FIN,SYN,RST,ACK SYN -m connlimit --connlimit-above 15 --connlimit-mask 32 -j DROP
-A INPUT -p icmp -m icmp --icmp-type 8 -m limit --limit 1/min -j ACCEPT
-A FORWARD -p tcp -m tcp --tcp-flags FIN,SYN,RST,ACK SYN -m limit --limit 1/sec -j ACCEPT
-A FORWARD -p tcp -m tcp --tcp-flags FIN,SYN,RST,ACK RST -m limit --limit 1/sec -j ACCEPT
-A FORWARD -p icmp -m icmp --icmp-type 8 -m limit --limit 1/sec -j ACCEPT
-A FORWARD -j REJECT --reject-with icmp-host-prohibited
-A syn-flood -m limit --limit 12/sec --limit-burst 24 -j RETURN
-A syn-flood -j DROP
COMMIT
# Completed on Fri Apr 14 16:37:31 2017