RE: Blocking Music Sharing.

["Bergeron, Jared" <jared.bergeron () office xerox com>]

I think the key here is a strong enforceable communicated policy and then identifying the traffic and addressing the 
user. I would go with an IDS (Snort is a good choice to IDENTIFY as you can easily write the sigs). Now granted Snort 
could pick it up on different ports depending on what it was looking for, however you need to think about tunneled 
connections via ssh and ssl. A good client inventory app seems to be the best way to catch these... Ahhh big brother 
and his tools.

Regards,
---------------------
Jared Bergeron
Systems Analyst / E-Security
XEROX Office Printing Business 

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From: Jason Bethune [mailto:jbethune () town kentville ns ca] 
Sent: Monday, September 15, 2003 10:07 AM
To: full-disclosure () lists netsys com

 

Snort is one tool used by alot of IT guys to block file sharing programs. THe trouble with these programs is that they 
have built in port "movers" that will scan the local network to find an available port to work on. Scripting is one way 
to do it....but that mostly just alerts you to the fact that there is traffice being used on your network for file 
sharing. I would like to know an exact way to block file sharing as well...

 

Jason Bethune

 

IT Specialist

Town of Kentville

354 Main Street

Kentville, NS 

B4N 1K6

 

www.town.kentville.ns.ca

 

 

  _____  

From: full-disclosure-admin () lists netsys com [mailto:full-disclosure-admin () lists netsys com] On Behalf Of 
Johnson, Mark
Sent: Monday, September 15, 2003 1:37 PM
To: full-disclosure () lists netsys com
Subject: [Full-disclosure] Blocking Music Sharing.

Due to the legal issues, I am trying to block access to sites like Kazaa and Limewire in the office.  If I am not 
mistaken, these networks can use different ports each time, so there is no way to block it at the firewall.  Is this 
right?  And if so, what is the best way to block access to these types of sites?

 

Many thanks,

Mark J.