black.box

Plug-and-Play VPN router and unblocker

View the Project on GitHub

black.box is a Linux based VPN policy router and content un-blocker. It currently runs on ARMv7 CPU equipped Raspberry Pi and other[n8] devices and helps un-block popular Internet content across tablets, smartphones, desktops, laptops and TVs over Wi-Fi or LAN.

TL;DR find a Raspbery Pi 3 and flash it with this image or try this on a PC

instructions

  1. obtain a Rasberry Pi 3 starter kit, download and uncompress the .img file, burn it to the SD card with Etcher[n3], then insert the card into the Pi
  2. connect the Pi to the Internet using a spare Ethernet port on your router[n6] and a 2.5A+ power supply[n2]
  3. after initial initialisation of around 10-20 minutes depending on your bandwidth[n5] and SD card speed[n10], visit http://blackbox.local/ URL
  4. click subscribe (if un-blocking) to setup up a PayPal billing agreement[n11] and claim your 1 month free trial or PAYG using Bitcoin[n7]
  5. once subscribed, you will be redirected back to the dash where you can monitor the status of the device
  6. when the dash lights up green, connect to a new Wi-Fi network called black.box (passphrase: blackbox) or set your default gateway to the black.box LAN IP (LAN mode) as shown on the dash
  7. now try accessing some previously blocked Internet content[n9]
  8. for issues, please email support, IRC channel #netflix-proxy on Freenode, or use the live chat link on the dash
  9. to be advised when important stuff happens, subscribe to push notifications on the dash

about

The device includes optional obfuscation/cloaking modes (SSH and SSL), to help function in hostile deep packet inspection (DPI) environments, as well as experimental WAN acceleration mode.

The device also supports a number of popular VPN services, such as PIA and VPNArea. Separate subscriptions/accounts required for supported VPN services. VPN client mode is free, so no black.box subscription is required.

Multiple black.box(es) can be used not only to un-block content, but to also establish private encrypted links between them (pairing). Leave one at home/office and dial back in securely when travelling or on holidays. Pairing mode is free, so no black.box subscription is required.

Devices connected to the black.box Wi-Fi network or routed via the device’s Ethernet (LAN) IP address, can typically access a number of blocked Internet content from anywhere in the world or to provide privacy and anonymity.

PayPal subscription or Bitcoin credit is required for un-blocking mode. The un-blocking service is offered on a rolling subscription basis, with 1 moth free trial using PayPal. Afterwards a monthly subscription fee applies, unless the subscription is cancelled prior to the next billing cycle. The subscription fee is €9.95 per month.

Alternatively, pay up-front using Bitcoin for as much time as you need. Price quoted based on EUR/BTC exchange rate. Top-up at any point prior to the existing Bitcoin credit expiry, or after. Any unused Bitcoin credit will be rolled over if topping up prior to existing credit expiry. Topping up after credit expiry will strike a new exchange rate.

For performance reasons, un-blocking traffic is routed via the un-encrypted[n4] tunnel/virtual interface. With policy routing enabled all the remaining traffic (e.g. google.com) goes out via the local Internet interface, when disabled, all traffic is sent via the tunnel. For security reasons, the tunnel interface may be restricted to only allow specific network ports[n1] for streaming, while the local interface is always unrestricted for gaming traffic, etc.

+---------+         +-----------------+
|         |  Wi-Fi  |                 |  Google, Facebook, etc.
|   iOS   | +-----> |    black.box    | +--------------------->
|         |         |    ---------    |
+---------+         |    VPN policy   |
                    |    router       |
+---------+         |                 |
|         |  Wi-Fi  |                 |
| Windows | +-----> |                 |
|         |         |                 |
+---------+         |                 |
                    |                 |
+---------+         |   Sling TV      |            +----------+
|         |  Wi-Fi  |   Netflix       |   tunnel   |          |
|  OS X   | +-----> |   Hulu          | +--------> | Exit US  +----+
|         |         |   etc.          |            |          |    |
+---------+         +-----------------+            +-----+----+ UK |
                                                        |          |
                                                        +----------+

dashboard

Once the device is running, the dash is accessible by navigating to http://blackbox.local/ while connected to the black.box Wi-Fi network or from the LAN. Please do not share your device GUID(s) (the long alpa-numeric string you see in the dash URL) as they are effectively credentials for anyone to access your devices settings and modify them. So, keep them secret.

A live demo dashboard is available here. The demo is connected to a device, which does not exist, so feel free to poke around.

black.box dashboard

If multiple regions are available to un-block, click a country flag in the top right corner of the dash. The device will re-boot with the new settings and un-block the selected country.

services

A number of popular services are available in policy routing mode on dash. If the service you require is missing please, email support, IRC channel #netflix-proxy on Freenode or use the live chat link on the dash to request it. In the meantime, disable Policy Routing (and optionally Local DNS) so all traffic goes via the tunnel interface.

cancellation

Please visit PayPal to cancel your black.box subscription.

qemu

If you don’t have a compatible device, or waiting for one to arrive, you can use your PC with QEMU to run black.box.

Mac OS X

cat << EOF > qemu-ifup.sh
#!/bin/bash
ifconfig bridge1 addm \$1
EOF

cat << EOF > qemu-ifdown.sh
#!/bin/bash
ifconfig bridge1 deletem \$1
EOF

chmod +x qemu-ifup.sh qemu-ifdown.sh

Linux

cat << EOF > qemu-ifup.sh
qemu-ifup.sh
#!/bin/bash
ip tuntap add $1 mode tap user `whoami`
ip link set $1 up
sleep 0.5s
ip link set $1 master br0
EOF

cat << EOF > qemu-ifdown.sh
qemu-ifdown.sh
#!/bin/bash
ip link delete $1
EOF

chmod +x qemu-ifup.sh qemu-ifdown.sh

Linux (libvirt)

mkdir -p /etc/qemu
echo "allow br0" > /etc/qemu/bridge.conf

sudo qemu-system-x86_64 \
  -nographic \
  -drive file=blackbox-qemux86_64.img,media=disk,cache=none,format=raw \
  -net nic,model=virtio,macaddr=$(echo -n "06:" ; openssl rand -hex 5 | sed 's/\(..\)/\1:/g; s/.$//') \
  -net bridge,br=br0 \
  -machine type=pc \
  -m 1024 \
  -smp 4

DD-WRT

Support for DD-WRT flashed routers is currently under development.

To install the preview:

curl --insecure https://api.unzoner.com/api/v1.0/ddwrt/group/default/provider/blackbox/install | sh

Tomato

Support for Tomato flashed routers is planned in the future.

technical architecture

black.box appliances can functions in a number of modes. In the default client mode, the device functions as an un-blocker. It automatically connects to the least busy black.box exit-node in the target region and routes traffic through the tunnel, while advertising a local Wi-Fi AP to all consumer devices within range.

In server mode, the device advertises its private GUID and listens for incoming VPN connections from paired device(s). Device(s) in paired mode, which have specified the private GUID in their configuration, locate and connect to the server node, while advertising a local Wi-Fi AP to all consumer devices within range. This mode is useful for establishing point to point links betwen two of more locations.

In VPN mode, the device supports connecting to a number of popular VPN services, such as PIA, VPNArea and VanishedVPN. Additional VPN providers can be easily integrated.

There are two more system modes the device can function in, namely exit-node and double-vpn. These are suitable for white-labelling of the black.box service and are not available via the dash. In exit-node mode, black.box devices advertise themselves to devices running in client mode. This mode is useful for deploying black.box exit-nodes anywhere in the world with an Internet connection and a power socket. In double-vpn mode, devices both listen for incoming VPN client connections, as well as establish a outbound connection to a down-stream VPN server.

black.box devices run on ResinOS, using resin.io management back-end. OpenVPN 2.4 is used for building black.box VPN tunnels, whether encrypted or otherwise. OpenSSL is compiled with NEON support to accelerate certain cryptographic functions on the ARMv7 CPUs and linked with OpenVPN. Stunnel and WANProxy are use for obfuscation and/or acceleration. You can expect to get anywhere from 5Mbit/s to 10Mbit/s through the Pi Ethernet interface in unblocking mode and less in VPN mode. VPN providers which use default SHA1 authentication should be a little faster, due to ARMv7 NEON optimisations.

Python 2.7 is used for the main application, together with Linux Bash shell scripts to help interface with the operating system. All Python code is compiled into executables using Nuitka on dynamically provisioned Digital Ocean Droplets for both armv7l (QEMU) and x86_64 architectures and shipped to devices in a secure manner, by first encrypting the payload using OpenSSL. Devices are managed using resin.io IoT infrastructure, which runs the black.box code inside Docker containers on custom ResinOS images. All runtime code is unpacked onto encrypted disk partitions inside Docker containers with all transient data stored in memory only and disk encryption keys never recorded. Source code for the main Python application is available at https://github.com/ab77/black.box/tree/master/src.

Amazon AWS (EBS) is used to host both the black.box API (demo) and the device dashboard (demo), which are implemented in Python-Flask and Bootstrap. Amazon RDS is used for transient data storage, persisting for no longer than one hour, although technically something like Redis would be a better architectural choice.

For subscriptions, the black.box API talks to the PayPal Subscriptions API to set-up monthly subscriptions. For Bitcoin payments, the BlockCypher API provides nesessary WebHooks to advise the black.box API when a payment has been received as well as a WebSocket notification for the dashboard. No Bitcoin payment provider (middle-man) is used in the Bitcoin payment flow.

Additional management VPS is used to provide ipinfo support services as well as execute automated headless video playback tests using Selenium WebDriver wrapped in Python.

footnotes

  1. default ports: 80/tcp, 443/tcp and 53/udp
  2. The radio in the Pi is weak, please try to locate as close as possible to the streaming device(s) or turn the radio off and use in LAN router mode.
  3. Raspberry Pi 2 Model B with an Alfa Network AWUS036NEH USB Wi-Fi dongle will also work and may even provide better signal due to the external Wi-Fi antenna.
  4. For performance reasons, the tunnel interface provides no additional packet encryption/authentication overheads.
  5. The initial application image is currently around 600MB. Subsequent updates are a fraction of that. Monitor by pinging blackbox.local from your LAN. If you have multiple black.box devices on your LAN, the second device will be called blackbox-2.local, the third blackbox-3.local and so on. Maximum 5 devices supported.
  6. For the paranoid, you can locate the device in your DMZ and restrict access to your LAN, however the device needs unrestricted oubound access to the Internet. Your DMZ should also forward mDNS (avahi-daemon) broadcast packets to your LAN for discovery/dashboard access. The device communicates with a private API at AWS over HTTPS and a number of OpenVPN endpoints to enable functionality.
  7. The dash will automatically refresh after Bitcoin payment has been confirmed. This could take a number of minutes, depending on the Bitcoin network load.
  8. Other supported devices include DD-WRT routers, Intel NUC, ODROID-C1+ (.img) and ODROID-XU4 (.img) among others. If you have a supported board, request an image.
  9. Try disabling both Policy Routing and Local DNS on the dash if you are having issues with a particular service. If you have router(s) on your network assigning IPv6 addresses, some IPv6 enabled services may not work (i.e. Netflix). Try disabling IPv6 on your network if this is the case.
  10. Not all SD cards are created equal, see microSD Card Benchmarks and get a fast one. Don’t get a cheap SD card since even if you get the device up and running initially, it will be very slow and will fail catastrophically shortly after.
  11. Subscriptions require PayPal support for recurring payments in the country where the buyer account is located (excludes Germany and Austria).
-- v1.0

© 2016 belodetek