On 2011-08-08, Joel Hobson <[email protected]> wrote: > I'm an undergraduate student working as a research assistant for the > summer. My current task is to figure out a way to measure delay caused > by individual nodes (we want to replicate this paper: > http://cis.poly.edu/~ross/papers/Tor.pdf). It seems to me that the > easiest way of accomplishing this would be to run an exit node and > construct a two-hop circuit to it. > > OP ------> Node to be measured -------> Exit node > > Since the OP and exit node are under my control, I could measure the > time it takes for any packets to reach the exit node from the OP. I want > to be the only one who can use this exit node so I don't have to worry > about getting approval from the school to run an exit node (could be > time-consuming). I realize this is pretty far from any design goals the > developers have, but is there some way of running a hidden exit node? > One that doesn't appear on any directory server (PublishServerDescriptor > 0 might work)****, but can still be used if you know its IP address? The > Tor Control Protocol makes it easy enough to create a custom circuit > (discussed here: http://thesprawl.org/memdump/?entry=8), but it won't > accept IP addresses for nodes. I can put an IP in exitnodes in the torrc > file, but exitnodes doesn't seem to have any effect, even when > StrictExitNodes is set.
* Configure the exit node with 'PublishServerDescriptor 0'. * Retrieve its 'server descriptor' using the control-port command 'GETINFO desc/id/<fingerprint of your exit node, as a hex string with no spaces or leading "$">'. * Add the descriptor for your exit node to your Tor client by sending the following to your client's control port: +POSTDESCRIPTOR purpose=general cache=no <put the descriptor here> . * Build circuits using the client's control port. For more information, see control-spec.txt in https://gitweb.torproject.org/torspec.git/tree .. Robert Ransom _______________________________________________ tor-relays mailing list [email protected] https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-relays
