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Re: Clueless firewall configuration ?
From: "PC" <peter () dachangs com>
Date: Fri, 11 Aug 2006 21:30:39 -0700

The trend seems to be moving towards application based devices blurring the lines between routers, switches, firewalls, etc. After all enough horsepower goes into many of the newer devices to accomodate all these functions. Whether it's a router, a switch, a firewall, a load balancer, an ids, an ips, it's all really just software modules. Like someone else said this would probably not be a pentest bonanza if set up properly. On the other hand would I feel all warm and fuzzy inside? Not yet anyway. I suppose it really isn't very different than having these functions on separate physical devices as a misconfiguration anywhere couls lead to a security risk. However my concern lies more in the fact that functions such as MLS and others devised to speed up packet processing could potentially cause packets to bypass a desired function due to an "undocumented feature" (ie. a bug).

Peter


----- Original Message ----- From: "cableguy clueless" <cluelesscableguy () gmail com>
To: <pen-test () securityfocus com>
Sent: Friday, August 11, 2006 1:08 PM
Subject: Clueless firewall configuration ?


Guys, I need to ask a favor, my boss knows nothing of IT
infrastructure, and our "cableguy" (manages the firewall through a
third party contract) proposed to him an architecture as  follows :

2 cisco 6509 each with firewall blade in them. These function as core
switches for a 1000 users site with lots of vlans and FW roules
between the vlans (oh and we are a big production site that relies on
these cores to let our ciritical bussiness process machines
communicate to the servers).

He wants to create 2 vlans, 1 for untrusted traffic and 1 vlan for DMZ
machines and assign physical ports to these to connect to the
internet. The DMZ vlan would also have some physical ports. These
ports would not be on the core switch but on the access layer switches
that are fiber attached to the distribution switches that attach to
the cores...

Does anyone care to comment on the security issues a setup as this
would pose? would this be pentest bonanza for you guys? and what would
the hackers make of a dmz vlan living in a big switch together with
other vlans?

I have some ideas myself, but would appreciate your take on this. I
know this is the pentest list but it is you guys who get to poke holes
in these designs...

CCG

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This List Sponsored by: Cenzic

Concerned about Web Application Security? Why not go with the #1 solution - Cenzic, the only one to win the Analyst's Choice Award from eWeek. As attacks through web applications continue to rise, you need to proactively protect your applications from hackers. Cenzic has the most comprehensive solutions to meet your application security penetration testing and vulnerability management needs. You have an option to go with a managed service (Cenzic ClickToSecure) or an enterprise software (Cenzic Hailstorm). Download FREE whitepaper on how a managed service can help you: http://www.cenzic.com/news_events/wpappsec.php And, now for a limited time we can do a FREE audit for you to confirm your results from other product. Contact us at request () cenzic com for details.
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