For those who are interested, here is how I turned my laptop into
a really good firewall:
http://georgetoft.com/linux/firewall/index.html

Here's an e-mail I received regarding this firewall.  He's an 
independent security specialist.  Can anyone verify he's as good
as I think he is (my evaluation is based on other e-mails)?

Subject: Re: [azipa] I need some advice...
Date: Mon, 2 Jul 2001 08:35:26 -0700
From: "Ron Russell" <ron@siliconbuddha.com>
To: "George Toft" <george@georgetoft.com>

And so it was.  I performed my intrusion test on 7/1/01 starting at 9:16
am.

I found absolutely zero vulnerabilities.  It is locked down very well.

Ron Russell - MCSE, CCNA, CNE
480-6-Buddha
Silicon Buddha LLC
Enlightened Network Services
www.siliconbuddha.com
----- Original Message -----
From: "George Toft" <george@georgetoft.com>
To: "Ron Russell" <ron@siliconbuddha.com>
Sent: Sunday, July 01, 2001 2:48 PM
Subject: Re: [azipa] I need some advice...


Hi Ron,

I really hope this is you:
Jul  1 09:36:57 router kernel: Packet log: input DENY eth0 PROTO=6
64.212.30.248:1624 130.13.163.229:568 L=48 S=0x00 I=2887 F=0x4000 T=112
SYN (#94)

Name:    64-212-30-248.nas1.PHX1.gblx.net
Address:  64.212.30.248

George