Netfilter/iptables is an IP information packet filtering system integrated with the latest Linux kernel version 2.4.x. If the Linux system is connected to the Internet or LAN, server, or a proxy server connected to the LAN and Internet, the system
The iptables firewall can be used to create filters and NAT rules. All Linux distributions can use iptables. Therefore, understanding how to configure iptables will help you manage Linux firewalls more effectively. If you contact iptables for the
Netfilter/iptablesIs an IP information packet filtering system integrated with the latest Linux kernel version 2.4.x. If the Linux system is connected to the Internet or LAN, server, or a proxy server connected to the LAN and Internet, the system
For this article, we will use iptables user space tool Version 1.2.6a and kernel version 2.4.9.
Linux security and Netfilter/iptablesLinux has become very popular in the IT industry because of its robustness, reliability, flexibility, and
The code is as follows
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#!/bin/sh#------------------------------------------------------------------------------# for debugging use Iptables-v.Iptables= "/sbin/iptables"Ip6tables= "/sbin/ip6tables"Modprobe=
1 iptables good script (reference)
Quote:
[Root @ server ~] # Cat/opt/iptables. Rule
#! /Bin/bash
#
# The interface that connect Internet
Extif = "ppp0"
# The inside interface. If you don't have this one
# And you must let this be black ex> inif = ""
For more information about IPTABLES configuration in linux-general Linux technology-Linux technology and application information, see the following. Simple Application of IPTABLES:
Iptables-a input-p tcp-s 10.1.2.187-j ACCEPT
Add 10.1.2.187 to the
1. Show the status of the firewallRun the following command with root privileges:
# iptables-l-n-v
Parameter description:
-L: Lists the rules.
-V: Displays detailed information. This option displays the interface name,
Http://os.51cto.com/art/201107/273443.htm"51CTO exclusive feature" Linux system administrators have been exposed to netfilter/iptables, this is the Linux system comes with a free firewall, the function is very powerful. In the following
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