mirror of
https://github.com/torproject/torspec.git
synced 2024-11-23 09:49:45 +00:00
6bd09d5076
Tor doesn't use SVN anymore, making $Revision$, $Id$ and $Date$ meaningless. Remove them without replacement.
65 lines
2.4 KiB
Plaintext
65 lines
2.4 KiB
Plaintext
Filename: 128-bridge-families.txt
|
|
Title: Families of private bridges
|
|
Author: Roger Dingledine
|
|
Created: 2007-12-xx
|
|
Status: Dead
|
|
|
|
1. Overview
|
|
|
|
Proposal 125 introduced the basic notion of how bridge authorities,
|
|
bridge relays, and bridge users should behave. But it doesn't get into
|
|
the various mechanisms of how to distribute bridge relay addresses to
|
|
bridge users.
|
|
|
|
One of the mechanisms we have in mind is called 'families of bridges'.
|
|
If a bridge user knows about only one private bridge, and that bridge
|
|
shuts off for the night or gets a new dynamic IP address, the bridge
|
|
user is out of luck and needs to re-bootstrap manually or wait and
|
|
hope it comes back. On the other hand, if the bridge user knows about
|
|
a family of bridges, then as long as one of those bridges is still
|
|
reachable his Tor client can automatically learn about where the
|
|
other bridges have gone.
|
|
|
|
So in this design, a single volunteer could run multiple coordinated
|
|
bridges, or a group of volunteers could each run a bridge. We abstract
|
|
out the details of how these volunteers find each other and decide to
|
|
set up a family.
|
|
|
|
2. Other notes.
|
|
|
|
somebody needs to run a bridge authority
|
|
|
|
it needs to have a torrc option to publish networkstatuses of its bridges
|
|
|
|
it should also do reachability testing just of those bridges
|
|
|
|
people ask for the bridge networkstatus by asking for a url that
|
|
contains a password. (it's safe to do this because of begin_dir.)
|
|
|
|
so the bridge users need to know a) a password, and b) a bridge
|
|
authority line.
|
|
|
|
the bridge users need to know the bridge authority line.
|
|
|
|
the bridge authority needs to know the password.
|
|
|
|
3. Current state
|
|
|
|
I implemented a BridgePassword config option. Bridge authorities
|
|
should set it, and users who want to use those bridge authorities
|
|
should set it.
|
|
|
|
Now there is a new directory URL "/tor/networkstatus-bridges" that
|
|
directory mirrors serve if BridgeAuthoritativeDir is set and it's a
|
|
begin_dir connection. It looks for the header
|
|
Authorization: Basic %s
|
|
where %s is the base-64 bridge password.
|
|
|
|
I never got around to teaching clients how to set the header though,
|
|
so it may or may not, and may or may not do what we ultimate want.
|
|
|
|
I've marked this proposal dead; it really never should have left the
|
|
ideas/ directory. Somebody should pick it up sometime and finish the
|
|
design and implementation.
|
|
|