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Disable Stream Isolation Easy

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Deactivate uwt Wrappers

The following instructions permanently deactivate all uwt wrappers and remove stream isolation for uwt wrapped applications system-wide. Consequently, all uwt wrapped applications revert to the default system networking configuration.

If you want more granular control of uwt wrapper deactivation, see Stream_Isolation#Deactivate_uwt_Stream_Isolation_Wrapper.

Open file /etc/uwt.d/50_user.conf in an editor with root rights.

(Qubes-Whonix ™: In TemplateVM)

This box uses sudoedit for better security. This is an example and other tools could also achieve the same goal. If this example does not work for you or if you are not using Whonix, please refer to this link. 

sudoedit /etc/uwt.d/50_user.conf

Add. 

uwtwrapper_global="0"

Save and exit.

Tor Browser Remove Proxy Settings

Introduction

This configuration means Tor Browser will no longer use proxy settings. With no proxy set, Tor Browser uses the (VM) system's default networking. This is identical to any other application inside the Whonix-Workstation ™ that has not been explicitly configured to use Tor via socks proxy settings or a socksifier. This setting is also called transparent torification. [1]

Note: This action will break both the Stream Isolation for Tor Browser and Tor Browser's tab isolation by socks user name. This worsens the web fingerprint and causes the user to be pseudonymous, rather than anonymous. To mitigate these risks, consider using More than one Tor Browser in Whonix ™, or better yet, Multiple Whonix-Workstation ™s.

If these settings are changed, expect Tor Button to show a red sign and state "Tor Disabled" if a mouse is hovered over it.

To enable transparent torification (no proxy setting), set the TOR_TRANSPROXY=1 environment variable. There are several methods, but the #/etc/environment Method is the simplest one.

Note: Choose only 1 method to enable transparent torification.

For other methods with finer granulated settings, please press on Expand on the right.

Command Line Method

Navigate to the Tor Browser folder. 

cd ~/tor-browser_en-US

Every time Tor Browser is started, run the following command to set the TOR_TRANSPROXY=1 environment variable. 

TOR_TRANSPROXY=1 ./start-tor-browser.desktop

start-tor-browser Method

This only applies to a single instance of the Tor Browser folder that is configured. This method may not persist when Tor Browser is updated.

Find and open start-tor-browser in the Tor Browser folder in an editor.

This is most likely in ~/tor-browser_en-US/Browser/start-tor-browser below #!/usr/bin/env bash.

Set. 

export TOR_TRANSPROXY=1

/etc/environment Method

This will apply to the whole environment, including any possible custom locations of Tor Browser installation folders. [2]

Open file /etc/environment in an editor with root rights.

(Qubes-Whonix ™: In TemplateVM)

This box uses sudoedit for better security. This is an example and other tools could also achieve the same goal. If this example does not work for you or if you are not using Whonix, please refer to this link. 

sudoedit /etc/environment

Add the following line. 

TOR_TRANSPROXY=1

Save and reboot.

Undo

Reverting this change is undocumented. Simply unsetting that environment variable will not work due to Tor Browser limitations. The easiest way to undo this setting is to install a fresh instance of Tor Browser (please contribute to these instructions)!

Ignore Tor Button's Open Network Settings

Whonix has disabled the Open Network Settings... menu option in Tor Button. Read the footnote for further information. [3]

Deactivate Miscellaneous Proxy Settings

On the Stream Isolation page, there is a list of applications that are pre-configured to use socks proxy settings via application configuration files. To disable this, the Whonix system default must be removed from the application's settings.

TODO: document and expand.

Remove proxy settings for APT repository files.

1. If you previously onionized any repositories, that has to be undone. See Onionizing Repositories.

2. Remove any mention of tor+ in file /etc/apt/sources.list (if you are using that - that file is empty by default in Whonix / Kicksecure) or any file in folder /etc/apt/sources.list.d.

3. Open file /etc/apt/sources.list /etc/apt/sources.list.d/* in an editor with root rights.

(Qubes-Whonix ™: In TemplateVM)

This box uses sudoedit for better security. This is an example and other tools could also achieve the same goal. If this example does not work for you or if you are not using Whonix, please refer to this link. 

sudoedit /etc/apt/sources.list /etc/apt/sources.list.d/*

4. Remove any mention of tor+.

The process of removing proxy settings from APT repository files is now complete.

Remove proxy settings for Tor Browser Downloader by Whonix ™.

Open file /etc/torbrowser.d/50_user.conf in an editor with root rights.

(Qubes-Whonix ™: In TemplateVM)

This box uses sudoedit for better security. This is an example and other tools could also achieve the same goal. If this example does not work for you or if you are not using Whonix, please refer to this link. 

sudoedit /etc/torbrowser.d/50_user.conf

Paste. [4] [5] 

TB_NO_TOR_CON_CHECK=1
CURL_PROXY="--fail"

Save.

For some applications, this is impossible:

These applications can only talk to Tor Onion Services directly and cannot be configured to use the system default. You can only deactivate sdwdate and/or not use Ricochet IM.

  1. ↑ This term was coined in context of a Tor Transparent Proxy. It acts as a simple gateway that routes all connections through Tor, but does not provide Stream Isolation.
  2. ↑ Unless this environment variable is manually unset before starting Tor Browser.
  3. ↑ The regular Tor Browser Bundle from The Tor Project (without Whonix ™) allows networking settings to changed inside Tor via the Open Network Settings menu option. It has the same effect as editing Tor's config file torrc. In Whonix ™, the environment variable export TOR_NO_DISPLAY_NETWORK_SETTINGS=1 has been set to disable the TorButton → Open Network Settings... menu item. It is not useful and confusing to have in the Whonix-Workstation ™ because:
    • In Whonix ™, there is only limited access to Tor's control port (see Dev/CPFP for more information).
    • For security reasons, Tor must be manually configured in /usr/local/etc/torrc.d/50_user.conf on the Whonix-Gateway ™, and not from the Whonix-Workstation ™ (see VPN/Tunnel support for more information).
  4. ↑ TB_NO_TOR_CON_CHECK=1 needs to be set because there is no filtered Tor ControlPort access when Whonix tunnel firewall is enabled, which would break tb-updater's Tor connectivity check.
  5. ↑ By tb-updater default, if unset, variable CURL_PROXY will be dynamically set to a Tor SocksPort on Whonix-Gateway ™. For example to CURL_PROXY="--proxy socks5h://user:password@10.137.6.1:9115".
    By using a curl parameter we are using anyhow, i.e. CURL_PROXY="--fail" we can in effect disable the environment variable even if it's technically still set. This will result in downloading by using the system's default networking.
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