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5 votes

problem with obfs4proxy and apparmor (solved)

In your torrc there is the line ClientTransportPlugin obfs4 exec /usr/bin/obfs4proxy --managed Furthermoer the log file states: Jun 08 21:33:05.000 [warn] Could not launch managed proxy ...
Jens Kubieziel's user avatar
  • 8,570
5 votes

find needed details of my own private obfs4 Tor bridge

From the obfs4proxy README: The autogenerated obfs4 bridge parameters are placed in DataDir/pt_state/obfs4_state.json. To ease deployment, the client side bridge line is written to DataDir/...
cacahuatl's user avatar
  • 11k
3 votes

Tails 3.0 blocks connection to ANY obfs4 bridge

Make sure your time zone and time settings are correct, if your system clock time is off, obfs4 will fail to connect. Tails automatically synchronize time upon start, but sometimes the time ...
Annon35's user avatar
  • 85
2 votes

Configure Obfs4 proxy with tor

You probably want to have a read through the Pluggable Transport specification, they're controlled and configured through environment variables. You'll need to set them appropriately to get it to work ...
cacahuatl's user avatar
  • 11k
2 votes
Accepted

How can I debug Tor connections to see where obfs4 fails?

You can edit your ClientTransportPlugin or ServerTransportPlugin for obfs4proxy to include a -logLevel followed by one of ERROR,WARN,INFO, or DEBUG, an -enableLogging=true flag to enable logging, and ...
cacahuatl's user avatar
  • 11k
2 votes

problem with obfs4proxy and apparmor (solved)

You could fix your problem with apparmor like this: First open /etc/apparmor.d/abstractions/tor with your favorite editor (with root user) sudo gedit /etc/apparmor.d/abstractions/tor Then change ...
Farbod Ahmadian's user avatar
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/[email protected] file. I was directed by Tor ops to modify this file to include only the following ...
joshlucien's user avatar
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 ...
Konrad Eisele's user avatar
2 votes
Accepted

Circumvent methods when Directory Authorities censored

In other document I read about if all of this Directory Servers become compromised then relays work as a cache to give the clients a list of Tor servers so it is probably not possible to shutdown Tor ...
Peter Gerber's user avatar
  • 1,342
1 vote

Tails 3.0 blocks connection to ANY obfs4 bridge

Set the time zone to London and change time to London time. You can update the time first when you connect to the wireless internet (not yet configuring tor), once that is done you can connect without ...
Nikki Mino's user avatar
1 vote

can obfs4 bridges bypass china firewall and turkey , iran's block?

it depends on usage case, but generally - yes. Obfs 3 and 4 are good when properly used - as all bridges you need to pay attention to elaborate the bridge key. But in such a countries you better use a ...
Alexey Vesnin's user avatar
  • 6,265
1 vote
Accepted

What are security implications of keeping same tor bridges versus rotating?

Bridges are like guards, there are advantages to keeping them and advantages to changing them. As a general rule you want to keep guards for as long as you can. Given a hypothetical pair of evil ...
cacahuatl's user avatar
  • 11k
1 vote

OBSF4 and scramblesuit

My little trick to connect to more obfs4 bridges in TAILS: First collect some working bridges via bridge DB (e.g. obfs3) or connect to regular tor. When connected cut the connection in the on/off ...
Fred's user avatar
  • 11
1 vote
Accepted

Is it possible to use built-in bridges or automatically request them for the tor daemon in Linux? (Not Tor Browser)

Sadly, getting bridges from bridges.torproject.org automatically to torrc is not possible without some kind of automation. As for what can be done, you have these options: Make a program that solves ...
NeverMine17's user avatar
1 vote

obfs4 bridge every 10-20 seconds send and receive some data on static or default browser pages

There are a few things that could affect traffic timing: Javascript, especially for advertisements, could be periodically uploading/downloading data (for example reporting back to the ad service or ...
Steve's user avatar
  • 3,142
1 vote

The scary torrc

First of all, backup your /etc/tor/torrc and revert to the original of something breaks. cp /etc/tor/torrc/ /etc/tor/torrc.backup All of the rest is in the manual. Exit nodes: ExitNodes node,...
elmerjfudd's user avatar
  • 2,274
1 vote
Accepted

Having trouble connecting to tor via cli but TorBrowser connects without Problems

I managed to get it working by setting the tor Data Directory to the same Data Directory of TorBrowser. I added this to my torrc: DataDirectory /Users/armin/Library/Application Support/TorBrowser-...
Armin Kazemi's user avatar
1 vote

Can my university network IT see that I am using Tor when I am using Tor Browser with an obfs4 pluggable transport?

The Tor Project put out a basic obfs4 Transport Evaluation. The pertinent quote is: The (obfs4) design improves on the vulnerability to censorship based on active attackers identifying suspect ...
elmerjfudd's user avatar
  • 2,274
1 vote

What is iat-mode at the end of obfs4's bridge lines?

Based upon the code that Andrei posted, it seems that 0 means IAT obfuscation is off, 1 means it is enabled, and 2 is paranoid. A random paper I found says IAT stands for "Inter-Arrival Time"...
HackerNCoder's user avatar
1 vote

No traffic on obfs4 bridge

I have the same problem. Did you restart tor or reboot your pi very often before you got all working and up for longer time? After i set up my bridge the first time i allways had 1-3 unique clients ...
Mark Luun's user avatar
1 vote

How does obfs4 work?

obfs4-spec does a pretty decent job explaining how it actually works. The idea is to make your traffic look like nothing in particular. I strongly advise you to read the spec (specially the Threat ...
Hamy's user avatar
  • 21
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 #...
eugene's user avatar
  • 11
1 vote

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

obfs4proxy gets most of its settings via environment variables (and couple of them via socks5 authentication fields in client mode). There is too much going on to post here but to get a better ...
Hamy's user avatar
  • 21

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