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damien stolarz blog

Blocking Peer-to-Peer File Sharing Programs with Cisco Firewall & Router

March 21st 2004 Posted in general

Related link: http://www.cisco.com/en/US/tech/tk583/tk372/technologies_tech_note09186a00801e41…

This is a nice synopsis of major P2P applications and their networking, in the form of a “how to block these apps”. Gives some insight on P2P and firewalls.

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Comments

  1. jwenting
    March 22nd, 2004 | 4:11 am

    or take the reverse approach
    and block all ports except a few very specific ones and link those to specific protocols and maybe even hosts (effectively allowing only HTTP and SMTP to go out and that only from the proxy server).