Penetration Testing mailing list archives
Re: Clueless firewall configuration ?
From: s-williams () nyc rr com
Date: Sat, 12 Aug 2006 11:50:19 +0000
Good point the company I work for have a core 4507, amount other devices, and a few 3500 series as the dmz for our web server and a few others Sent via BlackBerry from T-Mobile -----Original Message----- From: "Shenk, Jerry A" <jshenk () decommunications com> Date: Fri, 11 Aug 2006 21:36:39 To:cableguy clueless <cluelesscableguy () gmail com>, pen-test () securityfocus com Subject: RE: Clueless firewall configuration ? The Cisco marketing material makes it look like this is a good idea and it can probably be made secure but..no, BUT, one little slip-up and an attacker has access to your core switch. That slip-up can be either a management slip-up or a yet unknown firmware vulnerability from Cisco. From a design standpoint, I'd prefer to have the internal networking separated from the public network or the DMZ. One of the key tenants of security is multiple layers of security...that's pretty tough with this design. It doesn't matter which definition of DMZ is in use, the classic military-style definition or the more popular, incorrect service network definition, this is a weak design. To answer your question, "Would this be a pentest bonanza...?" Probably not, if it was set up right. ... but it might be tomorrow. -----Original Message----- From: cableguy clueless [mailto:cluelesscableguy () gmail com] Sent: Friday, August 11, 2006 4:08 PM To: pen-test () securityfocus com 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 ------------------------------------------------------------------------ ------ 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. 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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. ------------------------------------------------------------------------------
Current thread:
- Re: Clueless firewall configuration ?, (continued)
- Re: Clueless firewall configuration ? John Kinsella (Aug 12)
- Re: Clueless firewall configuration ? Chris Byrd (Aug 12)
- Re: Clueless firewall configuration ? John Kinsella (Aug 13)
- Re: Clueless firewall configuration ? John Kinsella (Aug 12)
- Re: Clueless firewall configuration ? PC (Aug 12)
- Re: Clueless firewall configuration ? okrehel (Aug 15)
- RE: Clueless firewall configuration ? Ng, Kenneth (US) (Aug 15)
- RE: Clueless firewall configuration ? Smith, Michael J. (Aug 16)
- RE: Clueless firewall configuration ? Ng, Kenneth (US) (Aug 18)
- RE: Clueless firewall configuration ? Smith, Michael J. (Aug 16)
- RE: Clueless firewall configuration ? Shenk, Jerry A (Aug 11)
- Re: Clueless firewall configuration ? s-williams (Aug 12)
- RE: Clueless firewall configuration ? Gonenc, Ozan (Aug 14)