Opened 7 years ago

Closed 2 years ago

#8097 closed defect (user disappeared)

I think tor is blocked by my internet provider

Reported by: 48ine Owned by: asn
Priority: Medium Milestone:
Component: Circumvention/Censorship analysis Version:
Severity: Blocker Keywords: censorship block jp
Cc: Actual Points:
Parent ID: Points:
Reviewer: Sponsor:

Description

Sorry, I'm really new to Tor, and proxies/etc. The other day, I downloaded the Tor Bundle for Mac OS X, and it would get stuck at "Establishing an encrypted directory connection".
I added bridges, tried the "Firewall only connects to certain ports" option, and even redownloaded to the 64-bit version. I'm not sure if I'm doing something wrong or I am somehow blocked from Tor? Also, I live in Japan.
Here is an image of how my message log looks: http://i46.tinypic.com/23u8ole.png

Child Tickets

Attachments (2)

obfsbridge_conn_debug.jpg (52.6 KB) - added by asn 7 years ago.
Screen Shot 2013-02-01 at 6.55.46 PM.png (26.6 KB) - added by 48ine 7 years ago.

Download all attachments as: .zip

Change History (12)

comment:1 Changed 7 years ago by asn

Component: TorCensorship analysis
Owner: set to runa
Priority: blockernormal
Version: Tor: 0.2.3.25

Hi,

the messages you are seeing look like potential censorship, but it could also be other things. Check out this page https://www.torproject.org/projects/obfsproxy and try using the latest censorship circumvention bundles: https://blog.torproject.org/blog/combined-flash-proxy-pyobfsproxy-browser-bundles

comment:2 Changed 7 years ago by 48ine

I've tried downloading OSX (10.6 & 10.7) Obfsproxy Tor Browser Bundle but for some reason, it goes straight to my downloads and says "The requested URL was not found on this sever." Will try the flash proxy/pyobfsproxy bundle though! Thank you, will post again tomorrow if it works or not.

comment:3 Changed 7 years ago by 48ine

I tried the flash proxy/pyobfsproxy bundle, and it is stuck at "Establishing an encrypted directory connection" again, but this time the message log is different. All the Proxy Clients say (server rejected connection)
ex) http://i49.tinypic.com/2bwbrq.png

Changed 7 years ago by asn

Attachment: obfsbridge_conn_debug.jpg added

comment:4 in reply to:  3 Changed 7 years ago by asn

Replying to 48ine:

I tried the flash proxy/pyobfsproxy bundle, and it is stuck at "Establishing an encrypted directory connection" again, but this time the message log is different. All the Proxy Clients say (server rejected connection)
ex) http://i49.tinypic.com/2bwbrq.png

Hi.

We fixed the links to the bundles in https://www.torproject.org/projects/obfsproxy.html.en .

Also, can you try something for me, so that we can figure out whether the problem is on the bundle or whether your ISP is blocking your connections to Tor bridges? Can you open a direct connection to an obfsbridge that was included in the bundle (for example 83.212.101.2:42782) and see if you get back a blob of data? The received data should look a bit like attachment:obfsbridge_conn_debug.jpg .

If you don't know how to do a direct connection using telnet or ncat in OS X, try opening a terminal, and writing "nc 83.212.101.2 42782" in it. You should get back a blob of data similar to the attached screenshot. If you get a connection error, then your ISP might actually be blocking those hardcoded obfsbridges.

comment:5 Changed 7 years ago by runa

Owner: changed from runa to asn
Status: newassigned

Changed 7 years ago by 48ine

comment:6 Changed 7 years ago by 48ine

Yes it didn't connect, so I'm assuming it's blocked. If so, is there any way to get around it?

comment:7 in reply to:  6 Changed 7 years ago by asn

Replying to 48ine:

Yes it didn't connect, so I'm assuming it's blocked. If so, is there any way to get around it?

Hm, that's funny. To be extra sure, can you also try connecting to another Tor bridge (say 128.31.0.34 1051) and also to another unrelated server (say 86.59.118.148 80). If it's censorship, on the first telnet you should get blocked, but the second should establish a connection and wait for you to type stuff. Is this the case?

Are you on a normal domestic connection, or in a university or something? If the former, it's the first time I see censorship from Japanese ISPs. We have a wiki with places that block Tor, but we don't have an entry for Japan: https://trac.torproject.org/projects/tor/wiki/doc/OONI/censorshipwiki
Since when did this blocking start and do you mind telling us which ISP you are using?

To get around it, you will either have to get new bridges from
https://bridges.torproject.org/ (click on "Looking for obfsproxy bridges?" and manually add the "obfs2 X.X.X.X XXXX" line to Vidalia), or you will have to enable flashproxy:
https://blog.torproject.org/blog/combined-flash-proxy-pyobfsproxy-browser-bundles
https://trac.torproject.org/projects/tor/wiki/FlashProxyHowto

comment:8 Changed 7 years ago by 48ine

Yes, the first one "timed out" again, and the server unrelated to Tor connected immediately. I'm using internet at a school dormitory, so that must be the case. There is a program called FortiGuard that blocks some websites from being accessed, hence why I wanted to install Tor.

comment:9 Changed 7 years ago by asn

Ugh. Sorry for dropping this to the ground.

Please send an email to help@rt.torproject.org and ask for some fresh obfs2 bridge addresses.

comment:10 Changed 2 years ago by dcf

Keywords: censorship block jp added
Resolution: user disappeared
Severity: Blocker
Status: assignedclosed

Closing for lack of activity.

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