Setup Your Computer to be a Router

Some might argue that setting up a separate PC as a router is a waste of time. Perhaps for most, this is true. However for the Linux geek, it provides a great opportunity to come out and play.

If you have two network cards or some other means of connecting to the internet and a network card in your ubuntu computer, it can be a very powerfull router. You can set up basic NAT, do port forwarding, set up a proxy, and even do packet prioritization so your downloads dont interfere with gaming! This howto will cover setting up Webmin which will be used to configure masquerading, DHCP, and DNS servers. It also lets you configure port forwarding. QoS (packet prioritization) will be covered in a later guide. This guide is made using kubuntu to show that it will work with any version of ubuntu.

Webmin
Webmin is a web based computer management tool. It is similar to the web interface that you get from routers you buy at stores, but allows you to control most of the computer.
To install webmin, you must first go to its website at www.webmin.com and download the latest version in the top right. Download the tar.gz version into your user folder…. Source: ubuntulinuxhowto.blogspot.com