19 votes
Accepted

How to run an obfs4 bridge?

The Tor Project's official guide is available here. It has instructions on how to set up an obfs4 bridge for several platforms, including Debian and Ubuntu. Don't forget to make sure that your OR port ...
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  • 2,762
7 votes

How do I add obfs3 bridges in torrc?

First you need to install obfsproxy package. Then configure torrc file like @user263485 said: UseBridges 1 # This works for Ubuntu Linux, adjust the path according to your platform ...
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  • 256
4 votes
Accepted

Obfsproxy problem in ubuntu

Premise How to configure Tor and Obfsproxy: - https://www.torproject.org/projects/obfsproxy-debian-instructions According with this bug report: https://trac.torproject.org/projects/tor/ticket/6996 .....
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4 votes

Does connections using obfs3 still work in China?

The new meek pluggable transport — currently in beta stage — is likely to work as it employs the same tricks than GoAgent, a popular circumvention method in China. Ready to use bundles are available ...
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  • 627
4 votes

How do I add obfs3 bridges in torrc?

Open torrc file. After first two comment lines which start with # add: Bridge obfs3 IP-address:port Fingerprint of bridge and save the file. For more information take a look at freebsd-ports ...
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4 votes

How to run an obfs4 bridge?

Great explanation, it helped me a lot. Like to add the following; These days I do not see a lot of obfs4 traffic yet. If you want to publish as an obfs3 AND obfs4 bridge relay you can change the line ...
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  • 41
3 votes

TOR and Obfsproxy packet size

TOR cell size is 512 bytes but most TOR packets have size of 586 bytes. My question is that why there is such difference in size (74 bytes difference)? The 586-byte packet being referenced in the ...
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3 votes

Does connections using obfs3 still work in China?

I confirm 100% obfs3 works as I'm using it right now. ( Instead meek does not work, maybe because it relay on Google ) You would need fresh obfs3 bridges, the one in the bundle are not working for me ...
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3 votes

How can I start obfs4proxy.exe without starting Tor Browser?

I have solved this problem. Under Windows 7, the absolute path must be used for the obfs4proxy configuration in torrc-default; the relative path for obfs4proxy plugin doesn't work! ## obfs4proxy ...
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  • 193
2 votes

Does connections using obfs3 still work in China?

According to How to read our China usage graphs and Tor calls for help as its supply of bridges falters, the obfs3 plugin for obfsproxy is still effective in China. What's missing are enough bridges ...
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  • 2,989
2 votes
Accepted

Relation between ORPort and ServerTransportListenAddr

The attacker wouldn't be able to find you if nobody tries to connect to your ORPort. If you didn't publish the bridge descriptor, nobody will know your ORPort.
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  • 725
2 votes

Could not launch managed proxy executable at '/usr/bin/obfs4proxy' ('Operation not permitted')

I have finally found a solution to this problem. For me, the offender was the /lib/systemd/system/tor@default.service file. I was directed by Tor ops to modify this file to include only the following ...
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2 votes
Accepted

ENVError while starting obfsproxy

obfsproxy should be setup inside of torrc if you wish to use it with tor, it shouldn't be executed seperately. The managed flag indicates that the opening process will be "managing" it, in this case ...
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  • 10.8k
2 votes
Accepted

How to use obfs4proxy.exe merely in a console?

A program that wants to connect to obfsproxy must first speak the Socks4 protocol with obfsproxy. obfsproxy also has to be started with the right Tor pluggable transport enviroment variables. There is ...
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2 votes

Using TOR bridges On Fedora (How to install obfs4proxy on Fedora)

There doesn't appear to be available/packaged for FC/RH, however... You could use the obfs4proxy binary packaged with Tor Browser by running. wget https://dist.torproject.org/torbrowser/6.0.4/tor-...
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  • 10.8k
1 vote

How do I run a bridge with obfs3 pluggable transport?

Bridges aren't published, they won't be used as exits but the reject policy won't cause any harm. The config looks good and it should work. I might be worth a few small changes though, they may not ...
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  • 10.8k
1 vote

Is there a obfs4 package for ARMv5?

You should be able to build it natively, as per the README here or you can try to cross-compile from another architecture to armv5 using the method here. For example export GOARCH=arm export ...
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  • 10.8k
1 vote

Could not launch managed proxy executable at '/usr/bin/obfs4proxy' ('Operation not permitted')

I modified apparmor profile /etc/apparmor.d/system_tor, just added three lines in it: /usr/bin/obfsproxy PUx, profile /etc/apparmor.d/usr.bin.obfsproxy { } Whole file sample: # vim:syntax=apparmor #...
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  • 11
1 vote

What does the log line "not enough directory information to build a circuit" mean?

It is just normal. It means Tor client did not finish fetching consensus, and as soon as it finishes, it starts to build circuits.
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  • 725
1 vote
Accepted

Remote Ethernet Devices blocking VPN and Tor

You should try pluggable transports, especially Meek and Obfs4. Of it won't help you, please post a torrc and error log here, I'll be able to help you further UPDATE 13.1.2016 on your edit: Try to ...
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  • 5,421
1 vote
Accepted

Is it possible to use obfsproxy bridges and Meek bridges together?

You can! Tor's source code patch required - as I did it at first, but there is an easier way to do so, I've figured it out and it is literally zero-patch one! You'll need three Tor instances running ...
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  • 5,421
1 vote
Accepted

How would I go about making obfs4 a standalone proxy for usage with OpenVPN or other programs?

obfs4 and obfs3, among others, are "pluggable transports", and the protocol they speak to Tor is well specified. You could write a program / script to implement that protocol in order to use any ...
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1 vote

Tor on computer connects fine using bridges, portable Tor does not

I used to have a similar problem as you. Now it is fixed for me, using the method described here: https://trac.torproject.org/projects/tor/ticket/17377 obfs4proxy crash no apparent reason ...
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1 vote

Add bridges on expert bundle

Give me an example of what it should include: This is an example torrc file: DataDirectory C:\Documents and Settings\ron\Desktop\Tor\Data #ControlPort 9151 SocksPort 9150 # UseBridges 1 # bridge 60....
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  • 708
1 vote

How can I run multiple obfuscated services on a machine?

As long as each obfsproxy instance binds a unique port, you can have as many of them as you have the resources to run.
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  • 2,989
1 vote

Obfsproxy problem in ubuntu

The log says that Tor tries to connect to a bridge with obfs2. This variant of obfs is deprecated and probably the bridge doesn't offer it anymore. You can try if this bridge uses obfs3 with two ways: ...
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  • 8,663
1 vote

[warn]Proxy Client:unable to connect to xxx.xxx.xxx("TTL Expired")

"Bridge at '109.105.109.163:47779' isn't reachable by our firewall policy." means that you have set your "ReachableAddresses" torrc option to tell Tor that it shouldn't even try to reach that address. ...
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