[Mini-tutorial] How to sniff a peer_id and key

**anon** · 28.04.09, 23:59

Note: this is a copy of this post. I copied it as a tutorial in this section so that it's easier to find.

You could use an sniffer to capture the data. smsniff is a good one. Start it, go to Options -> Capture filter, and write the following in the text area:

include:both:tcp:6969

Then download the Ubuntu 8.10 torrent. Press Start (the green triangle icon) in smsniff, then load and run the torrent in Azureus. You should notice an entry in the upper panel - "1, TCP, xx.xx....". Click it and you'll see something like this in the lower one:

Code:

GET /announce?info_hash=3%82...%82&peer_id=-AZ4202-klPJgt8C3DvS&supportcrypto=1&port=12345&azudp=12345&uploaded=0&downloaded=0&left=0&corrupt=0&event=started&numwant=50&no_peer_id=1&compact=1&key=yWq52bD8&azver=3 HTTP/1.1
User-Agent: Azureus 4.2.0.2;Windows XP;Java 1.6.0_13
Connection: close
Accept-Encoding: gzip
Host: torrent.ubuntu.com:6969
Accept: text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2


HTTP/1.0 200 OK
Content-Length: 409
Content-Type: text/plain
Pragma: no-cache
Content-Encoding: gzip
...

The peer_id and key are the values you're looking for - I colored them red. They'll be different for you. Just make sure you copy only what I colored - i.e. everything between &peer_id= and &supportcrypto=1, and everything between &key= and &azver=3.

Copy those values in the RatioMaster:

A note: Azureus sends a "dynamic" numwant. It's always 50 in the first announce, but after that it's randomized. Make sure it's set to 50 before you click Start. After that change it yourself to a random number between 30 and 60 every 30 minutes. Newer client files take care of that by randomizing the numwant automatically.

You're now good to go.