> Looking at the volunteer page at tor.eff.org, I spotted this: > We need an official central site to answer "Is this IP address a Tor > server?" questions. This should provide several interfaces, including a web > interface and a DNSBL-style interface. It can provide the most up-to-date > answers by keeping a local mirror of the Tor directory information. Bonus > points if it does active testing through each exit node to find out what IP > address it's really exiting from.
The Abusive Hosts Blocking List does DNSBL. http://www.ahbl.org/docs/torbl.php Their story about why they block the enitre Tor network is actually quite interesting: "A: Probably are talking about us, considering we refused to delist the entrance and transit nodes from the TORbl. The TORbl is used by both people wanting to block access from TOR nodes, but also block access TO tor nodes. " There's also this: http://proxy.org/tor.shtml They offer a .htaccess file. That too has the "He's in the Tor-network!!! BLOCK HIM!!" policy which completely ignores if the box in question actually has anything to do with exiting. Also, the trick that is used so sucessfully by some Tor-servers is to set OutboundBindAddress IP to something completely different than Address IP (if you have more than one IP). Blocking lists will block the Tor adress without having any idea what is really going on regarding exiting.. (just a tip, guys). As for DNSBL: What's (possibly) missing is a list which _only_ lists servers who allow exiting to say.. port 80 and 443. Or just IRC. Thus; people who want to block Tor could block only the servers who can connect to the service in question. > What kind of format would a web interface to this have? Just a textbox > where you enter an IP? Probably. https://nighteffect.us/tns/ has a box at the bottom where you can enter an IP (and select IP as query field) and it'll show you if the IP in question is Tor or not. If course, this will show you that 66.199.236.130 involvement with Tor is indicated, but won't tell you anything at all about 66.199.236.131, which is good (or bad) depending on your point of view.
