That said a large government project correlating other types of data such as Netflow, some type of traffic signatures, or some other form of identification would be required to identify and block Tor traffic on IPv6 networks.Īgain governments can make Tor hard to use but that it's extremely hard to make it impossible to use. Note: The task of scanning IPv4 has become trivial but the process for scanning all of the public IPv6 address space would be radically unmanageable due to the scale. Continuously scanning the entire IPv4 address space has become trivial for those with even a small budget so a campaign to find and block Tor nodes could easily be very effective, but it will never be absolute.įinally, keep in mind that once Tor users have been identified the government would likely monitor future connections by that user to locate new Tor bridges or similar connections. Keep in mind that governments with large financial resources can spend money to run tools like ZMAP.io to find potential Tor servers, including Tor Bridges, minutes after they are started. I would say it's easy to make Tor hard to use but that it's extremely hard to make it impossible to use. Similarly, the following list of Tor exit nodes could be useful for blocking Tor traffic from connecting to any given websites: That said there will be numerous ways around such efforts, people can still use VPNs to connect outside of a given area and then run the Tor traffic from another location or tunnel the traffic through, but this will effectively block many of the less technical people from accessing Tor. In order to block Tor, all that has to be done is have the current list of Tor nodes which can be found at the following link:Īnd then block them bi-directionally via the Routers or Firewalls.

How does tor work for beginners