Instant Messaging blocking

[trotunno]

I have a pix 535. I would like to block ALL instant messagin throught my firewall but am unsure which way to go about it. any input would be appreciated.

[pwicks]

Blocking Instant Messaging and Peer-To-Peer File Sharing Applications

http://www.cisco.com/en/US/products/sw/iosswrel/ps5207/products_white_paper0900aecd802efa46.shtml

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Blocking Peer-to-Peer File Sharing Programs with the PIX Firewall

http://www.cisco.com/en/US/products/hw/vpndevc/ps2030/products_tech_note09186a00801e419a.shtml

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If you are running version 7 of the Pix software, you have more options to stop IM traffic.

• Introduces new inspection services to detect and optionally block instant messaging, peer-to-peer file sharing, and other applications tunneling through Web application ports

• Blocks popular instant messaging applications such as AOL Instant Messenger, Microsoft Messenger, and Yahoo Messenger

• Stops peer-to-peer file sharing applications such as KaZaA and Gnutella

• Thwarts tunneling applications such as GoToMyPC

http://www.cisco.com/en/US/products/hw/vpndevc/ps2030/products_data_sheet0900aecd80225ae1.html