HowTo: Building a firewall with Freebsd and IPfilter (Page 1 of 6)
Written by
Steve Lake
Posted on: May 14, 2008 at 01:02pm
Section:
Tutorials
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For anyone who's ever been on
the internet, even for as little as five minutes, knows that you can't play in the great
big world wide web anymore without some kind of protection. Typically this comes in
the form of either simple NAT based protection, or something stronger such as a
firewall. In this tutorial I will be walking you through the setting up Freebsd for
maximum security, and and then as a full fledged firewall. Since security is of the
utmost importance, the machine you choose to use as your firewall should be set aside
strictly for this task and should not be used for anything else. I say this because
additional services on the machine may create a potential security risk you won't want to
deal with.
For those wondering why I'm using Freebsd for this tutorial, it's because Freebsd is
well suited to this kind of task, and is also one of the few OS's I trust to do the job
properly. There are a couple others out there you could use if you wanted to, but
for this tutorial we'll be focusing on Freebsd as the core of your new firewall.
Now, let's get started building ourselves a firewall. If you're not sure what a
firewall is, I recommend reading our "Understanding Firewalls" tutorial
first before you begin.
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