Encrypted torrents Defeat NBAR?

Unanswered Question
Jun 6th, 2010
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Hi All

I Wondering if any ones has complete block traffic with encrypted Torrents.

When torrents is not encrypted NBAR is recognizes torrents traffic and is easy to block them , in other way when the client torrent (like utorrent) is enabled the encryption ,  NBAR does not recognize at all and is bypass my firewall

Any Solution for this?

Sorry for my english.

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Marcin Latosiewicz Mon, 06/07/2010 - 07:22
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  • Cisco Employee,


I don't think there is anythign anyone can do against encryption short of doign man in the middle attack (quite computation intensive).

Several years ago I was doing some testing with AIP + encrypted torrent. Same thing no hits as soon as encryption was enabled.



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