firewall howto - iptables

[John K Masters]

On Sat, 28 Oct 2006 13:56:25 -0700
Noah <admin2 at enabled.com> wrote:

> Hi there.
> 
> My ubuntu server is acting as my NAT box between my upstream provider 
> and my internal network.
> 
> I am looking for a nice example of iptables rules that I can put in 
> place to add a decent amount of filtering for my server and my
> internal network.
> 
> Might somebody have a good example script they can send me or a HOWTO 
> web link?
> 
> thanks in advance,
> 
> Noah
> 
Couple of scripts that may help from O'Reilly's Linux Server Security.
You really need to read the book to fully understand the concepts.

http://examples.oreilly.com/linuxss2/examples2.tar.gz

John