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[tor-talk] Failed to connect to tor netword with the provided obfs3 bridges when using the tor-browser-linux64-3.6-beta-1.



Hi all,

I'm very glad to know that the tor-browser-bundle issue the latest beta
release as follows:

https://www.torproject.org/dist/torbrowser/3.6-beta-1/tor-browser-linux64-3.6-beta-1_en-US.tar.xz

In this release, it support threes types of build-in bridges:

1- obfs3 (recommented)
2- fte
3- flashproxy

In my case, considering that I use router for surfing and don't set the
port fordwarding on the router,  I don't test the  flashproxy bridges
shipped with the above tor-browser-bundle.

As for the other two types tranport bridges, i.e., the fte, and obfs3
bridgers, I find that I can use the fte method while the obfs3 doesn't work.

See the following for detail:

When use the obfs3 as the transport type within  the options of "connect
with provided bridges":

-------------------
Mar 27 15:32:54.000 [notice] Bootstrapped 5%: Connecting to directory
server.
Mar 27 15:32:54.000 [notice] Bootstrapped 10%: Finishing handshake with
directory server.
Mar 27 15:33:24.000 [warn] Proxy Client: unable to connect to
209.141.36.236:45496 ("server rejected connection")
Mar 27 15:33:24.000 [warn] Proxy Client: unable to connect to
208.79.90.242:35658 ("server rejected connection")
Mar 27 15:33:24.000 [warn] Proxy Client: unable to connect to
169.229.59.75:46328 ("server rejected connection")
Mar 27 15:33:24.000 [warn] Proxy Client: unable to connect to
109.105.109.163:38980 ("server rejected connection")
Mar 27 15:33:24.000 [warn] Proxy Client: unable to connect to
109.105.109.163:47779 ("server rejected connection")
Mar 27 15:33:24.000 [warn] Proxy Client: unable to connect to
83.212.101.3:60475 ("server rejected connection")
-----------------------

When use the fte as the transport type within  the options of "connect with
provided bridges":

-----------------
Mar 27 15:49:33.000 [notice] Bootstrapped 15%: Establishing an encrypted
directory connection.
Mar 27 15:49:34.000 [notice] Bootstrapped 20%: Asking for networkstatus
consensus.
Mar 27 15:49:34.000 [notice] Bootstrapped 50%: Loading relay descriptors.
Mar 27 15:49:35.000 [notice] new bridge descriptor 'pdxtorbridge01'
(fresh): $271EC1874E40FE65C145C6397AA34FFF7008E50E~pdxtorbridge01 at
131.252.210.150
Mar 27 15:49:35.000 [notice] I learned some more directory information, but
not enough to build a circuit: We have no usable consensus.
Mar 27 15:49:36.000 [notice] new bridge descriptor 'FTEPROXY03' (fresh):
$17AF9F9F4E57614A060B7221DCCEDB8BB546DD73~FTEPROXY03 at 79.125.3.12
Mar 27 15:49:36.000 [notice] I learned some more directory information, but
not enough to build a circuit: We have no usable consensus.
Mar 27 15:50:01.000 [notice] I learned some more directory information, but
not enough to build a circuit: We have no usable consensus.
Mar 27 15:50:03.000 [notice] I learned some more directory information, but
not enough to build a circuit: We need more microdescriptors: we have
0/5285, and can only build 0% of likely paths. (We have 0% of guards bw, 0%
of midpoint bw, and 0% of exit bw.)
Mar 27 15:50:05.000 [notice] Bootstrapped 52%: Loading relay descriptors.
Mar 27 15:50:05.000 [notice] Bootstrapped 54%: Loading relay descriptors.
Mar 27 15:50:07.000 [notice] Bootstrapped 56%: Loading relay descriptors.
Mar 27 15:50:08.000 [notice] Bootstrapped 58%: Loading relay descriptors.
Mar 27 15:50:08.000 [notice] Bootstrapped 60%: Loading relay descriptors.
Mar 27 15:50:09.000 [notice] Bootstrapped 62%: Loading relay descriptors.
Mar 27 15:50:09.000 [notice] Bootstrapped 64%: Loading relay descriptors.
Mar 27 15:50:09.000 [notice] Bootstrapped 66%: Loading relay descriptors.
Mar 27 15:50:09.000 [notice] Bootstrapped 68%: Loading relay descriptors.
Mar 27 15:50:09.000 [notice] Bootstrapped 70%: Loading relay descriptors.
Mar 27 15:50:10.000 [notice] Bootstrapped 72%: Loading relay descriptors.
Mar 27 15:50:10.000 [notice] Bootstrapped 74%: Loading relay descriptors.
Mar 27 15:50:10.000 [notice] Bootstrapped 76%: Loading relay descriptors.
Mar 27 15:50:10.000 [notice] Bootstrapped 78%: Loading relay descriptors.
Mar 27 15:50:44.000 [notice] We now have enough directory information to
build circuits.
Mar 27 15:50:44.000 [notice] Bootstrapped 80%: Connecting to the Tor
network.
Mar 27 15:50:44.000 [notice] Bootstrapped 90%: Establishing a Tor circuit.
Mar 27 15:50:47.000 [notice] Tor has successfully opened a circuit. Looks
like client functionality is working.
Mar 27 15:50:47.000 [notice] Bootstrapped 100%: Done.
--------------------

 Considering that the obfs3 is the recommented type of tranport bridge, why
I meet this issue?  Any hints on this issue will be highly appreciated.

Regards
-- 
Hongyi Zhao <hongyi.zhao@xxxxxxxxx>
Xinjiang Technical Institute of Physics and Chemistry
Chinese Academy of Sciences
GnuPG DSA: 0xD108493
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