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PSA: Don't torrent over TOR (tor.stackexchange.com)

submitted 10 months ago by onlinepersona@programming.dev to c/piracy@lemmy.dbzer0.com

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It doesn't make you anonymous. Torrent protocol wasn't designed with anonymity in mind and there are a million ways you're going to leak your actual IP address.
Tor is a TCP only network.
While this doesn't give you the anonymity you wanted, it will hurt the network for other users.

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[-] zaknenou@lemmy.dbzer0.com 20 points 10 months ago

Tor is a TCP only network.
Can someone ELI5 this point for me? I know there is TCP and UDP, is UDP safer then ?

[-] Zatore@lemm.ee 53 points 10 months ago* (last edited 10 months ago)

TCP is a protocol where all the data is verified when sent. There is extra back and forth communication along with the payload to check that the payload arrived safely. Its great for downloading files when you want to make sure nothing is missing or damaged. UDP is more like a constant data stream where the sender doesn't care if it all gets to you. The advantage is that you send less data overall, useful if you don't care if one frame of a video stream looks weird.

One protocol isn't safer than another, its all about how much bandwidth you have/need. Torrenting over TOR uses up way more bandwidth than needed. Depending on the implementation, TCP can use 50% more bandwidth.

[-] emptiestplace@lemmy.ml 25 points 10 months ago

and sometimes we do care about successful delivery but need to handle that ourselves so we use UDP to avoid layering delivery verification mechanisms.

https://openvpn.net/faq/what-is-tcp-meltdown

[-] PraiseTheSoup@lemm.ee 4 points 9 months ago

and sometimes we do care about successful delivery but need to handle that ourselves

Am I right to assume this is generally carried out by the users' torrent client which is why we prefer UDP for torrenting?

[-] emptiestplace@lemmy.ml 1 points 9 months ago

I'm definitely not an expert on Bittorrent, but I believe the person above was incorrect - I think there are some extensions to the protocol that enable UDP transport, but typically Bittorrent traffic occurs primarily via TCP.

What you said makes perfect sense in that hypothetical context, though!