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Network Security Security-Basics
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RE: VALN hopping

Subject: RE: VALN hopping
Date: Wed, 28 Sep 2005 17:50:37 -0700
Safeguard against traversing VLANs is getting better, but I still don't
like the idea of having mixed security VLANs on the same switch. There
are still a number of exploits that have a chance of working, such as
CAM table flooding. IMHO, good design physically separates the security
zones- you really can't rely that logical constraints are going to
always work, but then I'm a belt-and-suspenders kind of guy when it
comes to network design. I'm expecting something to fail.

Ian Hayes | Senior Systems Engineer
Wynn Las Vegas
3131 South Las Vegas Blvd, Las Vegas, NV 89109
Ph (702) 770-3252 | Cell (702) 266-6002
Ian.hayes@wynnlasvegas.com
 
-----Original Message-----
From: josh@tstc.edu [mailto:josh@tstc.edu]
Sent: Wednesday, September 28, 2005 9:59 AM
To: security-basics@securityfocus.com
Subject: VALN hopping

WWe are having a heated discussion about using VLAN's as a type of
DMZ, so
I am asking the experts.  I prsonally like to see physical isolation;
however, our network person doesn't feel there is a threat of VLAN
hopping.  Please let me know your opinions.

Thank you,





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