Thus spake Moritz Bartl (moritz@xxxxxxxxxxxxxx): > On 08.02.2012 19:16, Mike Perry wrote: > > One of my goals is to provide an alternative to captchas and IP bans in > > the form of computational proof of work: > > https://trac.torproject.org/projects/tor/ticket/4666 > > I don't see why all Torbutton installations should constantly waste CPU > cycles unless this is deployed on a lot of websites. And I mean A LOT. > And that just won't happen. If you read the ticket, the design sketch does not require constant CPU burning. You would only use the CPU until you built up a sufficient pile of tokens, and you would only do that intermittently. > I believe it's more important to make it easy for people to detect Tor > and deal with it differently in the first place. The second step then is > to provide useful alternatives to blocking. > > Currently, what happens is that sites just ban/blacklist the IPs, often > automatically and "forever". When people report abuse to us, I have a > hard time helping them. All I can do is point them to the DNSBL and the > Bulk List Exporter, and ask kindly to not block these IPs for too long, > but most likely they will load it into their iptables and that's that. > My vision would be a Wordpress plugin that lets me choose to deal with > Tor users differently, say, automatically require moderation on comments. Maybe. But for sites like Google, Yelp, scroogle, it is often just anonymous read-only access that causes problems. > I would like to see a list of sites that block Tor. We can then try to > contact them individually to discuss potential alternative strategies. Historically, Google and Yelp have been hard to work with over this point. I think the core problem for them is that the minority of scrapers consist of the majority of Tor requests, at least until the captchas/bans kick in and the scrapers go away until they expire.. -- Mike Perry
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