On Wed, 17 Jun 2009 15:12:27 +0200 Alexander Bernauer <alex-...@copton.net> wrote: >I always wondered how Tor can help circumventing censorship.=20 > >If I were a dictator I would force the ISPs to block access to the >directory servers. If that's not enough one can retreive the list of all >Tor nodes and block them. > >Can anyone explain me what I am missing? > For blocked directory servers:
## Use tunneled directory server connections when available ## (defaults to 0) TunnelDirConns 1 ## Avoid using directory servers that do not provide tunneled connections ## (defaults to 0) PreferTunneledDirConns 1 For general blocking of tor relays from tor(1) man page: Bridge IP:ORPort [fingerprint] When set along with UseBridges, instructs Tor to use the relay at "IP:ORPort" as a "bridge" relaying into the Tor network. If "fingerprint" is provided (using the same format as for DirServer), we will verify that the relay running at that loca- tion has the right fingerprint. We also use fingerprint to look up the bridge descriptor at the bridge authority, if it's pro- vided and if UpdateBridgesFromAuthority is set too. UpdateBridgesFromAuthority 0|1 When set (along with UseBridges), Tor will try to fetch bridge descriptors from the configured bridge authorities when feasi- ble. It will fall back to a direct request if the authority responds with a 404. (Default: 0) UseBridges 0|1 When set, Tor will fetch descriptors for each bridge listed in the "Bridge" config lines, and use these relays as both entry guards and directory guards. (Default: 0) Scott Bennett, Comm. ASMELG, CFIAG ********************************************************************** * Internet: bennett at cs.niu.edu * *--------------------------------------------------------------------* * "A well regulated and disciplined militia, is at all times a good * * objection to the introduction of that bane of all free governments * * -- a standing army." * * -- Gov. John Hancock, New York Journal, 28 January 1790 * **********************************************************************