Re: Blocking Music Sharing.

["Larry Roberts" <larryr () netbeam net>]

MessageMark,

If you have a Cisco infrastructure you can use NBAR. NBAR looks at more than just port numbers to identify traffic and 
Cisco regularly writes new PDLMs to define new applications. You can also create custom lists to look for new 
applications that Cisco doesn't yet support. Check out the following link for more info:

http://www.cisco.com/en/US/products/sw/iosswrel/ps1838/products_feature_guide09186a0080134add.html

HTH,
Larry Roberts
CCIE #7886 (R&S / Security)
Nexperts, Inc
"The Networking Experts"
Office: (602) 445-3915
Fax: (602) 288-8616


  ----- Original Message ----- 
  From: Johnson, Mark 
  To: full-disclosure () lists netsys com 
  Sent: Monday, September 15, 2003 9:37 AM
  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.