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> nobody is going to DDOS you via Tor Uhh, yes they will... and that is pretty much the exact reason for the captcha.

• jMyles 11y ago
  Is this true? Tor specifically disavows this: https://www.torproject.org/docs/faq-abuse.html.en#DDoS https://www.torproject.org/docs/faq-abuse.html.en#DDoS
• tete 11y ago
  It's rather hard and inefficient to do that over Tor. It's actually way easier to just use your regular botnet or pretty much every other approach.[1] And then it's rather simple to prevent this with your ordinary approach. There are currently around 1000 exit nodes[2]. Compared to most DDOS attacks that is really small number of nodes. For various reasons (measures that are mostly there to make sure Tor can be used for regular browsing in a usable manner, even when there is people that want to download lots of large files) you will run into limitations rather quickly. [1] https://www.torproject.org/docs/faq-abuse.html.en#DDoS https://www.torproject.org/docs/faq-abuse.html.en#DDoS [2] https://metrics.torproject.org/relayflags.html?graph=relayflags&start=2015-08-10&end=2015-11-08&flag=Exit https://metrics.torproject.org/relayflags.html?graph=relayfl...
• xena 11y ago
  More likely they will try to perform a Denial Of Service while appearing to be Distributed, so "DDOS" is technically accurate.
• gjulianm 11y ago
  As tete says, it'd be rather inefficient to do a DDoS via Tor. I think that the reason for the captcha is more related with security, to avoid spammers or bots to getting through via Tor. Cloudflare explains the issue here: https://support.cloudflare.com/hc/en-us/articles/203306930-Does-CloudFlare-block-Tor- https://support.cloudflare.com/hc/en-us/articles/203306930-D...