恢复IpTables的默认设置(Script) - - 网络安全 - 防火墙

防火墙

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·ARP欺骗技术
·防火墙软件Netfilter之包过滤技术
·用iptales实现包过滤型防火墙(一)
·防火墙软件Netfilter之NAT技术
·使用iptable实现动态防火墙
·企业网中用Linux作为路由器
·基于Linux的路由器和防火墙配置
·用ipchains构建防火墙和IP伪装
·一个实用的防火墙配置范例
·构建基于ipchains的Linux防火墙

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恢复IpTables的默认设置(Script)

##!/bin/sh
#
# Resets the iptables to default values, in case you screw something up
# while setting your rc.firewall up - as I did quite a few times;)
#
# Author: Oskar Andreasson
# (c) of BoingWorld.com, use at your own risk, do whatever you please with
# it as long as you don't distribute this with due credits to
# BoingWorld.com

#
# reset the default policies in the filter table.
#
/usr/local/sbin/iptables -P INPUT ACCEPT
/usr/local/sbin/iptables -P FORWARD ACCEPT
/usr/local/sbin/iptables -P OUTPUT ACCEPT

#
# reset the default policies in the nat table.
#
/usr/local/sbin/iptables -t nat -P PREROUTING ACCEPT
/usr/local/sbin/iptables -t nat -P POSTROUTING ACCEPT
/usr/local/sbin/iptables -t nat -P OUTPUT ACCEPT

#
# flush all the rules in the filter and nat tables.
#
/usr/local/sbin/iptables -F
/usr/local/sbin/iptables -t nat -F

#
# erase all chains that's not default in filter and nat table.
#
/usr/local/sbin/iptables -X
/usr/local/sbin/iptables -t nat -X

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