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RE: IPTables Based Firewall Testing
From: "Shawn Jackson" <sjackson () horizonusa com>
Date: Wed, 17 Dec 2003 14:56:31 -0800


        Really an IPTables/Netfilter equipped *NIX box is not really the
best solution for any really concerned about security. Fw on OpenBSD
still runs a better, more controllable firewall but Netfilter is
catching up. Comparing a IPTables/Netfilter firewall box against say a
Checkpoint (Nokia IPSO), Cisco PIX or even a SonicWall or Watchguard box
there is no comparison. Firewall appliances usually run an extremely
tightened version of NetBSD or another early BSD (like) system. Unlike
*NIX which can have many software packages installed with multiple
vulnerabilities. Appliances are extremely optimized to suite their task
and provide smooth operations for that task while a general OS has to
think of everything it *may* run.

        We run a Checkpoint Firewall on the Nokia IPSO (IP330) and its
rock solid and extremely secure. But when you pay $80,000 bucks for a
firewall you better be getting your moneys worth. Am I saying that
IPTables is bad, nope. I run it on all my DMZ hosts to protect them from
'behind-the-firewall' traffic. I personally use IPTables on a Debian box
at home as my firewall. But if I'm protecting a LAN with sensitive
information behind it, a *NIX box with IPtables is farthest from my
mind.

Note: CC'ed to sec-basic list due to relevancy.

Shawn Jackson
Systems Administrator
Horizon USA
1190 Trademark Dr #107
Reno NV 89521
www.horizonusa.com
 
Email: sjackson () horizonusa com
Phone: (775) 858-2338
       (800) 325-1199 x338

-----Original Message-----
From: bob richie [mailto:bobr () rentech net] 
Sent: Wednesday, December 17, 2003 2:43 PM
To: Shawn Jackson
Subject: RE: IPTables Based Firewall Testing

Shawn, 
We have a great failover solution for IPTables.  You sound like you use
this quite a bit.  How do you feel it compares to Checkpoint?  We are
looking at running it on BladeFusion for our customers or use
SmoothWall.

Bob Richie
615-254-8324
www.rentech.net

Helping YOU do more on the WEB!

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-----Original Message-----
From: Shawn Jackson [mailto:sjackson () horizonusa com] 
Sent: Tuesday, December 16, 2003 4:25 PM
To: Gareth Darby; security-basics () securityfocus com
Subject: RE: IPTables Based Firewall Testing


        I'd run Nessus against it to see if you get anything. Run it
against the external and internal interfaces and that should give you a
pretty good idea of your security outlook.

Shawn Jackson
Systems Administrator
Horizon USA
1190 Trademark Dr #107
Reno NV 89521
www.horizonusa.com
 
Email: sjackson () horizonusa com
Phone: (775) 858-2338
       (800) 325-1199 x338

-----Original Message-----
From: Gareth Darby [mailto:gdarby () aztech-communications co uk] 
Sent: Tuesday, December 16, 2003 8:02 AM
To: security-basics () securityfocus com
Subject: IPTables Based Firewall Testing



Hi, 

I was wondering what kind of processes would be involved in testing a
firewall built around IPtables.  How could you ensure that the rules are
sufficient? Is a simple port scan enough?

Gareth

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