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ooni / probe

OONI Probe network measurement tool for detecting internet censorship
https://ooni.org/install
BSD 3-Clause "New" or "Revised" License
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Detect Kademlia/Mainline DHT blocking #1644

Open FedericoCeratto opened 4 years ago

FedericoCeratto commented 4 years ago

Detecting blocking of https://en.wikipedia.org/wiki/Mainline_DHT could be done with simple UDP tests. Partially related to ooni/probe-engine#47 - the DHT can be used by bittorrent but also other applications.

hbednar commented 4 years ago

@arvidn Given your in depth knowledge of the protocol. Are you able to advise or give advice on this.

arvidn commented 4 years ago

Is it typically important to make traffic look very authentic, to avoid malicious filtering that could detect the probes and let them through?

I would expect just a simple get_peers message would be sufficient for the simple case, with a freshly randomized node id and target ID.

Something like this:

d1:ad2:id20:<20-random-bytes>9:info_hash20:<20-random-bytes>1:q9:get_peers1:t2:<2-random-bytes>1:y1:qe