This article will be my first in a series of articles about network security. I decided to write this article about iptables while it is still fresh from my memory. This is intended for beginners who wish to get familiar with the basics of Iptables(like me) and some basic concepts in creating a network firewall.

What is Iptables?

Iptables is a program in Linux that is used to setup, maintain and inspect IPv4 packet filter rules. For IPv6 traffic, there is also an Ip6tables program that can be used to inspect IPv6 packet filter rules. Since IPv4 address is already almost depleted, I find it very important to give examples in both IPv4 and IPv6 packet filtering.

This is not a polished article, I wrote this before as my personal notes and for me to share it to anyone who would like to experiment IPv6 in their homes.

So since its World IPv6 Day today, I decided to just copy and paste it here. These are steps on how to create an IPv6 tunnel from your home PC or laptop using the gogo6 client software.

You can install and run gogo6 client in Windows, BSD, Linux and MacOSes but the steps here are tried and tested in my Ubuntu 10.04 Linux PC.

Create freenet6.net Account

1. go to http://gogonet.gogo6.com/page/freenet6-registration

2. fill up the following

Desired Userid
Email Address
Password