Tor Project shares proposals to limit DDoS impact on Onion sites

guest · Aug 19, 2020

Tor Project shares proposals to limit DDoS impact on Onion sites
August 19, 2020
https://www.bleepingcomputer.com/ne...roposals-to-limit-ddos-impact-on-onion-sites/

The Tor Project proposed some defense schemes that could be used in the future to limit the impact of distributed-denial-of-service (DDoS) attacks that have been plaguing defend dark web (Onion) sites for years [1, 2].

These defense options would maintain both usability and security after they are applied, making it possible for servers hosting onion services to no longer crash when they are hit by a denial-of-service (DoS) attack.

"The attacks exploit the inherent asymmetric nature of the onion service rendezvous protocol, and that makes it a hard problem to defend against," Tor Project Core Developer George Kadianakis said.
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However, the Tor Project has been discussing solutions to improve the availability of onion services during DoS attacks for a while now, with a number of them being proposed over a year ago (including the ones presented by Kadianakis): [...]
Proposed solutions for the DoS problem
The options suggested by Kadianakis could provide "long-term defense to the problem while maintaining the usability and security of onion services."
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Tor Project: How to stop the onion denial (of service)

Even though the toolbox of available defenses for onion service operators has grown, the threat of DoS attacks still looms large. And while there is still a bunch of smaller-scale improvements that could be done, we believe that this is not the kind of problem that a parameter tweak or small code change will make it disappear. The inherent nature of the problem makes us believe that we need to make fundamental changes to address it.
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Tor Project shares proposals to limit DDoS impact on Onion sites

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