CentOS6.8 設置iptables

一、指令 vim /etc/sysconfig/iptables
添加如下內容和要開放的端口

Firewall configuration written by system-config-firewall

Manual customization of this file is not recommended.

*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
-A INPUT -s x.x.x.x/32 -i eth1 -j DROP
-A INPUT -s y.y.y.y/32 -d 10.45.185.47/32 -j ACCEPT
-A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT
-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A FORWARD -j REJECT --reject-with icmp-host-prohibited
COMMIT

###############保存iptables文件，重啓服務###############

裏面有禁止IP和容許IP的設置