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[tor-bugs] #4185 [Tor Bridge]: Bridge easily detected by GFW
#4185: Bridge easily detected by GFW
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Reporter: hrimfaxi | Owner:
Type: defect | Status: new
Priority: normal | Milestone:
Component: Tor Bridge | Version: Tor: 0.2.3.5-alpha
Keywords: | Parent:
Points: | Actualpoints:
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I tried to setup a bridge relay in USA and access it from China. But it
seems their communication can be detected very soon and got filtered by
the GFW.
At first I thought it's because the address of my bridge relay got
published and leaked to the GFW staffs. But even I set
PublishServerDescriptor to 0 in the torrc of bridge the blockade still
occurs.
Every bridge relay I setup can only live 1~10 minutes before they got
blocked and were no longer accessible in China, used the telnet utility
for confirming that.
When the blockade occurs, not only bridges but also normal relays were
blocked.
If I change the bridge port (like from 443 to 444) then it can be
connected again before the next blockade occurs after 1~10 minutes.
I tried the both stable 0.2.1.x and alpha (0.2.3.5-alpha) release of tor
and they were all vulnerable.
Was it a new attack to block tor traffic?
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/4185>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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