Attacked Over Tor - The Hacker Factor Blog
However, running this hidden service has been a learning experience. The problems that I’m experiencing with my Tor Hidden Service are similar but different from non-Tor services. They have the same basic causes – bots and denial-of-service attacks – but the Tor architecture introduces a serious problem. This problem leads to choke point on the hidden service server. Bad bots and attackers can create a bottleneck, resulting in a denial of service. Without rewriting the tor daemon or spawning dozens of parallel servers, there are few mitigation options.