I think updated antivirus, proper user permissions, and a well configured IDS would be your best
bet in security in this instance. USB drives can be very useful in many different lines of work,
and disabling their use would probably not be the wisest move. Disabling the entire USB system
would be, in my opinion, a terrible idea, as many devices interface only through USB. I would
suggest implementing an IDS that has the ability to monitor the network for virus/trojan/spyware
signs, and to disconnect offending computers from the network before infections can spread
(perhaps by moving infected computers to an unauthorized vlan). This, combined with a good
antivirus, should keep you relatively secure. Make sure to educate your employees about proper
security protocols as well, so that they know how to avoid contaminating your network. Good luck.
Jon Lawhead
Network Security Coordinator
Residential Computing, UC Berkeley
On Tue, 29 Mar 2005 16:20:46 -0500
"Andrew McIntosh" <amcintosh@networkadvocates.com> wrote:
Hello Everybody,
I am curious to see the different suggestions for this scenario:
Suppose you have a small company of less than 100 employees. One of the
employees likes to bring his work home on occasion. He does so using a
USB thumb drive. One day he catches a [virus, worm, Trojan, spyware,
anything you can think of] at home and it winds up on his thumb drive,
which he in turn brings to the company network.
The company certainly should have anti-virus software in place, which
would fix that problem. But what if he unknowingly loads a key logging
program that could capture private customer information? What do you
suggest? Here is what I could think of so far:
Disable USB Port - That would solve the particular problem and create
other problems. For instance, substitute the thumb drive with a floppy
disk or CD. For obvious reasons you don't want to disable those as well.
Restrict user permissions - That could potentially prevent a program
from installing itself, but it would also cause the user some grief if
they need to install programs themselves, or even do simple things like
changing personal settings.
Security Policy - Haven't looked into this yet, but maybe there is a way
to prevent the use of thumb drives and other specific devices through
security policy.
What do you think?
Thanks!
====================
amcintosh@ntad.com
====================
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