centOS7 下利用iptables配置IP地址白名单的方法

*filter 
:INPUT ACCEPT [0:0] 
:FORWARD ACCEPT [0:0] 
:OUTPUT ACCEPT [0:0] 
-N whitelist 
-A whitelist -s 1.2.3.0/24 -j ACCEPT 
-A whitelist -s 4.5.6.7 -j ACCEPT 
-A INPUT -m state --state RELATED,ESTABLISHED -j whitelist 
-A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j whitelist 
-A INPUT -m state --state NEW -m tcp -p tcp --dport 8080 -j whitelist 
-A INPUT -p icmp -j ACCEPT 
-A INPUT -i lo -j ACCEPT 
-A INPUT -j REJECT --reject-with icmp-host-prohibited 
-A FORWARD -j REJECT --reject-with icmp-host-prohibited 
COMMIT