自动化部署iptables防火墙脚本

#!/bin/sh


# Remove any existing rules
# 清除规则
/sbin/iptables -F
# 清除用户自定义规则
/sbin/iptables -X
# 清除链的计数器
/sbin/iptables -Z

# setting default firewall policy
# 设置INPUT,OUTPUT,FORWARD链的默认规则
/sbin/iptables -P INPUT DROP
/sbin/iptables -P FORWARD DROP
/sbin/iptables -P OUTPUT INPUT

# setting for loopback interface
/sbin/iptables -A INPUT -i lo -j ACCEPT
/sbin/iptables -A OUTPUT -o lo -j ACCEPT

# setting for icmp
/sbin/iptables -A INPUT -p icmp -j ACCEPT

/sbin/iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
/sbin/iptables -A OUTPUT -m state --state ESTABLISHED,RELATED -j ACCEPT

# global rules
/sbin/iptables -A INPUT -p tcp --dport 22 -j ACCEPT
/sbin/iptables -A INPUT -p tcp -s 12.114.114.114/32 -j ACCEPT
/sbin/iptables -A INPUT -p tcp --dport 23005 -j ACCEPT
/sbin/iptables -A INPUT -p tcp -s 124.23.62.96/32 -m comment --comment "办公室固定ip" -j ACCEPT
/sbin/iptables -A INPUT -p tcp -s 192.168.2.0/24 -m comment --comment "IDC机房内网网段" -j ACCEPT
/sbin/iptables -A INPUT -p tcp -s 10.0.0.0/24 -m comment --comment "其他机房的内网网段" -j ACCEPT
/sbin/iptables -A INPUT -p tcp -s 203.82.23.0/24 -m comment --comment "其他IDC机房的外网网段" -j ACCEPT
/sbin/iptables -A INPUT -p tcp --dport 80 -j ACCEPT

/usr/sbin/service iptables save