gluetun/README.md

# Private Internet Access Client (OpenVPN+Iptables+DNS over TLS on Alpine Linux)

*Lightweight VPN client to tunnel to private internet access servers*

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| Image size | RAM usage | CPU usage |
| --- | --- | --- |
| 19.9MB | 14MB to 80MB | Low to Medium |

<details><summary>Click to show base components</summary><p>

- [Alpine 3.10](https://alpinelinux.org) for a tiny image
- [OpenVPN 2.4.7](https://pkgs.alpinelinux.org/package/v3.10/main/x86_64/openvpn) to tunnel to PIA servers
- [IPtables 1.8.3](https://pkgs.alpinelinux.org/package/v3.10/main/x86_64/iptables) enforces the container to communicate only through the VPN or with other containers in its virtual network (acts as a killswitch)
- [Unbound 1.9.1](https://pkgs.alpinelinux.org/package/v3.10/main/x86_64/unbound) configured with Cloudflare's [1.1.1.1](https://1.1.1.1) DNS over TLS
- [Files and blocking lists built periodically](https://github.com/qdm12/updated/tree/master/files) used with Unbound (see `BLOCK_MALICIOUS` and `BLOCK_NSA` environment variables)
- [TinyProxy 1.10.0](https://pkgs.alpinelinux.org/package/v3.10/main/x86_64/tinyproxy)

</p></details>

## Features

- <details><summary>Configure everything with environment variables</summary><p>

    - [Destination region](https://www.privateinternetaccess.com/pages/network)
    - Internet protocol
    - Level of encryption
    - PIA Username and password
    - DNS over TLS
    - Malicious DNS blocking
    - Internal firewall
    - Web HTTP proxy
    - Run openvpn without root

    </p></details>
- Connect other containers to it, [see this](https://github.com/qdm12/private-internet-access-docker#connect-to-it)
- **ARM** compatible
- Port forwarding
- HTTP proxy for LAN devices
- The *iptables* firewall allows traffic only with needed PIA servers (IP addresses, port, protocol) combinations
- OpenVPN reconnects automatically on failure
- Docker healthcheck pings the DNS 1.1.1.1 to verify the connection is up
- Unbound DNS runs *without root*
- OpenVPN can run *without root* but this disallows OpenVPN reconnecting, it can be set with `NONROOT=yes`


## Setup

1. <details><summary>Requirements</summary><p>

    - A Private Internet Access **username** and **password** - [Sign up](https://www.privateinternetaccess.com/pages/buy-vpn/)
    - External firewall requirements, if you have one
        - Allow outbound TCP 853 to 1.1.1.1 to allow Unbound to resolve the PIA domain name at start. You can then block it once the container is started.
        - For UDP strong encryption, allow outbound UDP 1197
        - For UDP normal encryption, allow outbound UDP 1198
        - For TCP strong encryption, allow outbound TCP 501
        - For TCP normal encryption, allow outbound TCP 502
        - For the built-in web HTTP proxy, allow inbound TCP 8888

    </p></details>

1. Ensure `/dev/net/tun` is setup on your host with either:

    ```sh
    insmod /lib/modules/tun.ko
    # or...
    modprobe tun
    ```

1. <details><summary>CLICK IF YOU HAVE AN ARM DEVICE</summary><p>

    - If you have a ARM 32 bit v6 architecture

        ```sh
        docker build -t qmcgaw/private-internet-access \
        --build-arg BASE_IMAGE=arm32v6/alpine \
        https://github.com/qdm12/private-internet-access-docker.git
        ```

    - If you have a ARM 32 bit v7 architecture

        ```sh
        docker build -t qmcgaw/private-internet-access \
        --build-arg BASE_IMAGE=arm32v7/alpine \
        https://github.com/qdm12/private-internet-access-docker.git
        ```

    - If you have a ARM 64 bit v8 architecture

        ```sh
        docker build -t qmcgaw/private-internet-access \
        --build-arg BASE_IMAGE=arm64v8/alpine \
        https://github.com/qdm12/private-internet-access-docker.git
        ```

    </p></details>

1. Launch the container with:

    ```bash
    docker run -d --init --name=pia --cap-add=NET_ADMIN --device=/dev/net/tun \
    -e REGION="CA Montreal" -e USER=js89ds7 -e PASSWORD=8fd9s239G \
    qmcgaw/private-internet-access
    ```

    or use [docker-compose.yml](https://github.com/qdm12/private-internet-access-docker/blob/master/docker-compose.yml) with:

    ```bash
    docker-compose up -d
    ```

    Note that you can:
    - Change the many [environment variables](#environment-variables) available
    - Use `-p 8888:8888/tcp` to access the HTTP web proxy (and put your LAN in `EXTRA_SUBNETS` environment variable)
    - Pass additional arguments to *openvpn* using Docker's command function (commands after the image name)

## Testing

Check the PIA IP address matches your expectations

```sh
docker run --rm --network=container:pia alpine:3.10 wget -qO- https://ipinfo.io
```

## Environment variables

| Environment variable | Default | Description |
| --- | --- | --- |
| `REGION` | `CA Montreal` | One of the [PIA regions](https://www.privateinternetaccess.com/pages/network/) |
| `PROTOCOL` | `udp` | `tcp` or `udp` |
| `ENCRYPTION` | `strong` | `normal` or `strong` |
| `USER` | | Your PIA username |
| `PASSWORD` | | Your PIA password |
| `NONROOT` | `no` | Run OpenVPN without root, `yes` or `no` |
| `DOT` | `on` | `on` or `off`, to activate DNS over TLS to 1.1.1.1 |
| `BLOCK_MALICIOUS` | `off` | `on` or `off`, blocks malicious hostnames and IPs |
| `BLOCK_NSA` | `off` | `on` or `off`, blocks NSA hostnames |
| `UNBLOCK` | | comma separated string (i.e. `web.com,web2.ca`) to unblock hostnames |
| `EXTRA_SUBNETS` | | comma separated subnets allowed in the container firewall (i.e. `192.168.1.0/24,192.168.10.121,10.0.0.5/28`) |
| `PORT_FORWARDING` | false | Set to `true` to read the forwarded port |
| `PROXY` | `on` | `on` or `off`, to switch the internal HTTP proxy |
| `PROXY_LOG_LEVEL` | `Critical` | `Info`, `Warning`, `Error` or `Critical` |
| `PROXY_PORT` | `8888` | `1024` to `65535` internal port for HTTP proxy |
| `PROXY_USER` | | Username to use to connect to the HTTP proxy |
| `PROXY_PASSWORD` | | Passsword to use to connect to the HTTP proxy |

## Connect to it

There are various ways to achieve this, depending on your use case.

- <details><summary>Connect containers in the same docker-compose.yml as PIA</summary><p>

    Add `network_mode: "service:pia"` to your *docker-compose.yml* (no need for `depends_on`)

    </p></details>
- <details><summary>Connect other containers to PIA</summary><p>

    Add `--network=container:pia` when launching the container, provided PIA is already running

    </p></details>
- <details><summary>Connect containers from another docker-compose.yml</summary><p>

    Add `network_mode: "container:pia"` to your *docker-compose.yml*, provided PIA is already running

    </p></details>
- <details><summary>Connect LAN devices through the built-in HTTP proxy (i.e. with Chrome, Kodi, etc.)</summary><p>

    1. Setup a HTTP proxy client, such as [SwitchyOmega for Chrome](https://chrome.google.com/webstore/detail/proxy-switchyomega/padekgcemlokbadohgkifijomclgjgif?hl=en)
    1. Ensure the PIA container is launched with:
        - port 8888 published `-p 8888:8888/tcp`
        - your LAN subnet, i.e. 192.168.1.0/24, set as `-e EXTRA_SUBNETS=192.168.1.0/24`
    1. With your HTTP proxy client, connect to the Docker host (i.e. `192.168.1.10`) on port `8888`. You might need to enter your credentials if you set them with the environment variables `PROXY_USER` and `PROXY_PASSWORD`.
    1. If you set `PROXY_LOG_LEVEL` to `Info`, you can check the log output of tinyproxy with:

        ```sh
        docker exec -it pia cat /var/log/tinyproxy/tinyproxy.log
        ```

        `PROXY_LOG_LEVEL` defaults to `Critical` to avoid logging everything, for privacy purposes as well as to save storage.

    </p></details>
- <details><summary>Access ports of containers connected to PIA</summary><p>

    In example, to access port `8000` of container `xyz`  and `9000` of container `abc` connected to PIA,
    publish ports `8000` and `9000` for the PIA container and access them as you would with any other container

    </p></details>
- <details><summary>Access ports of containers connected to PIA, all in the same docker-compose.yml</summary><p>

    In example, to access port `8000` of container `xyz`  and `9000` of container `abc` connected to PIA, publish port `8000` and `9000` for the PIA container.
    The docker-compose.yml file would look like:

    ```yml
    version: '3'
    services:
      pia:
        image: qmcgaw/private-internet-access
        container_name: pia
        cap_add:
          - NET_ADMIN
        devices:
          - /dev/net/tun
        environment:
          - USER=js89ds7
          - PASSWORD=8fd9s239G
        ports:
          - 8000:8000/tcp
          - 9000:9000/tcp
      abc:
        image: abc
        container_name: abc
        network_mode: "service:pia"
      xyz:
        image: xyz
        container_name: xyz
        network_mode: "service:pia"
    ```

    </p></details>

## Port forwarding

By setting `PORT_FORWARDING` environment variable to `true`, the forwarded port will be read and written to `/forwarded_port`.

You can mount this file as a volume to read it from other containers.

Note that not all regions support port forwarding.

## For the paranoids

- You can review the code which essential consists in the [Dockerfile](https://github.com/qdm12/private-internet-access-docker/blob/master/Dockerfile) and [entrypoint.sh](https://github.com/qdm12/private-internet-access-docker/blob/master/entrypoint.sh)
- Build the images yourself:

    ```bash
    docker build -t qmcgaw/private-internet-access https://github.com/qdm12/private-internet-access-docker.git
    ```

- The download and unziping of PIA openvpn files is done at build for the ones not able to download the zip files
- Checksums for PIA openvpn zip files are not used as these files change often (but HTTPS is used)
- Use `-e ENCRYPTION=strong -e BLOCK_MALICIOUS=on`
- DNS Leaks tests might not work because of [this](https://github.com/qdm12/cloudflare-dns-server#verify-dns-connection) (*TLDR*: DNS server is a local caching intermediary)

## TODOs

- Mix logs from unbound, tinyproxy and openvpn in Docker logs
- Maybe use `--inactive 3600 --ping 10 --ping-exit 60` as default behavior
- Try without tun

## License

This repository is under an [MIT license](https://github.com/qdm12/private-internet-access-docker/master/license)