How to build a simple wireless authenticated gateway using OpenBSD
Without spending a lot of money you to can build an authenticated gateway solution to verify your WIFI users. First and foremost you need to get your hands on the coolest free BSD system for firewalls and security devices. In this example I will be using OpenBSD3.6 stock standard as a build and a base system (but I guess you could use FreeBSD5.3 – me thinks the newer FreeBSD are getting a bit bloated but the background fscking, fscking rocks dude!)
Once you have installed your neighborhood OS in your server (go ahead and install all the packages from the OpenBSD installation CD, heck I have 40G worth of SATA drive on my brand spanking new Dell 1U server so I don't really care) you only need to change a couple of files within your /etc directory before you can start rocking.
By Rosli Sukri at Hack In The Box.
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