PowerTunnel

Powerful and extensible proxy server

Telegram channel
Check out the Android version!

What is it

PowerTunnel is an extensible proxy server built on top of LittleProxy.

PowerTunnel provides an SDK that allows you to extend its functionality however you like, and even handle encrypted HTTPS traffic (powered by LittleProxy-MITM), which can be especially useful in web development. PowerTunnel has an Android version, so any plugin you write can work on almost all devices.

PowerTunnel was originally developed and is best known as a censorship bypass tool. This functionality has been spun off in the LibertyTunnel plugin which is installed by default, just like DNS Resolver with DNS over HTTPS support.

Anti-censorship tool

Digital censorship has become widespread in authoritarian and developing countries: governments install DPI - Deep Packet Inspection systems - for Internet Service Providers, which allows analyzing and blocking traffic to websites they don't want you to see, forcing you to use slow and often paid proxies or VPN services with dubious privacy policy.

PowerTunnel is an active DPI circumvention utility - it works only on your PC and do not route your traffic through some third-party webservers. It creates a local proxy server on your device and diverts your HTTP(S) traffic there, where PowerTunnel modifies your traffic in a special way to exploit bugs in DPI systems which makes it possible to bypass the lock - without (significantly) slowing down your Internet connection.

Anti-censorship module can be configured in Plugins window - it is called LibertyTunnel.

In this sense, PowerTunnel is a free cross-platform implementation of GoodbyeDPI written in Java.

Please, note that PowerTunnel does not change your IP address.

Configuring

Downloading PowerTunnel

PowerTunnel binary can be downloaded from the Releases page.

If you don't trust the prebuilt binaries, you can build PowerTunnel from source - it is using Gradle build system.

Launching PowerTunnel

PowerTunnel is a portable Java application, and it does not require additional steps to get it working.

You need to install Java to run PowerTunnel.

PowerTunnel can be started by double-clicking the executable .jar file or by starting it from command line (see below).

After the first launch, PowerTunnel will create directories for storing plugins and configuration files.

Installing plugins

To install a plugin, just place its .jar file into plugins directory.

Please, make sure you do not have installed different versions of the same plugin.

Configuring plugins

Installed plugins can be configured from the user interface - click the "Plugins" button of main window to see the list of plugins.

Launch arguments

You can specify some params that will override settings through CLI:

$ java -jar PowerTunnel.jar -help

    --help                            display help
    --start                           start proxy server after load
    --console                         run application in console mode
    --ip <arg>                        set proxy server IP address
    --port <arg>                      set proxy server port
    --auth-username <arg>             set proxy authorization username
    --auth-password <arg>             set proxy authorization password
    --upstream-proxy-host <arg>       set upstream proxy host
    --upstream-proxy-port <arg>       set upstream proxy port
    --upstream-auth-password <arg>    set upstream proxy password
    --upstream-auth-username <arg>    set upstream proxy username
    --upstream-proxy-protocol <arg>   set upstream proxy protocol [HTTP/SOCKS4/SOCKS5]
    --minimized                       minimize UI to tray after start
    --set-ui-scale-factor <arg>       set UI scale factor
    --auto-proxy-setup-ie             setup proxy using Internet Explorer [Windows]
    --disable-auto-proxy-setup        disable auto proxy setup
    --disable-native-skin             disable platform native UI skin
    --disable-tray                    disable tray mode
    --disable-ui-scaling              disable UI scaling
    --disable-updater                 disable Update Notifier
    --enable-logging                  enable logging to file
    --lang <arg>                      set UI language
    --cfg <arg>                       set preference value
    --version                         print version details

If you need to set a certain plugin preference, use -cfg pluginID.preferenceKey [value]

Bundled Plugins

• LibertyTunnel - anti-censorship plugin for PowerTunnel
• DNS Resolver - DNS Resolver with DNS over HTTPS (DoH) support

Dependencies

• LittleProxy - proxy server, forked version
• LittleProxy-MITM - LittleProxy SSL extension
• dnsjava - DNS and DoH library
• dnssecjava - DNSSec implementation for dnsjava
• SLF4J - logging facade API
• Log4j - logger implementation
• Java Native Access - accessing system native API
• SwingDPI - High DPI scaling