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Re: posting hidden service descriptors

Roger Dingledine wrote:
On Tue, Mar 20, 2007 at 12:37:22PM -0400, James Muir wrote:
I know that hidden servers must post their descriptors to the DAs anonymously to avoid exposing their IP addresses. Is this done through a normal (i.e. three hop) circuit?


I suspect it is not because in src/or/circuitbuild.c there is a condition for creating one-hop tunnels and a log message "Launching a one-hop circuit for dir tunnel."

No, one-hop circuits are for begin_dir cells. See 6.2.1 in tor-spec.txt. They let you connect to a directory port in an encrypted authenticated manner, which can also be handy when your local network is filtering certain http requests or ports. The one-hop circuits are intended for cases where currently you'd just be making a direct connection: now you connect to the Tor server and ask to connect to its dirport.

Thanks for the clarification! That makes sense to me now.