[bittorrent] Best tool for sniffing BitTorrent messages?

Harold Feit dwknight at depthstrike.com
Wed Aug 12 20:24:13 EDT 2009

Trying to sniff while the two clients are running with encryption
enabled is going to kidney-punch your efforts a fair bit. Whatever
client you're basing your observations on NEEDS to have the encryption off.

Kirk True wrote:
> Hi all,
> I'm looking at sniffing the requests that various BitTorrent clients 
> make in order to improve my prototype client. I started off using 
> Wireshark but I can't get it to reliably recognize BitTorrent messages. 
> Interestingly the messages my prototype BitTorrent client generates are 
> parseable in Wireshark while those interchanged between Transmission are 
> not.
> So, for Linux, Mac OS X, Windows, what is the best tool for sniffing the 
> messages that the BitTorrent clients generate? I can use tcpdump, 
> Wireshark, etc. to see the TCP traffic, but I'd like a tool that will 
> "understand" the requests and display them as BitTorrent messages.
> I've got to believe this is possible. I've done this 100 times over for 
> HTTP, SMB, my own code, etc.
> Ideas?
> Thanks,
> Kirk
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