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docker-openvpn-client

Complexity is the worst enemy of security.

--- Bruce Schneier

A simple docker openvpn client. It opens a VPN connection and routes the traffic of containers through the tunnel.

Usage

First, start the vpn container. Your ovpn file must be available at the /vpn/config/config.ovpn path in the container. Note that to connect using anything other than the host's localhost, you must add the network to advertise too. You do not need to do this if it was already done in another container sharing the same network (such as an stunnel connainer):

docker run \
  --cap-add NET_ADMIN \
  --e LOCAL_LAN=192.168.1.0/24 \
  --e DNS=8.8.8.8 \
  --volume /home/me/vpnConfiguration/:/vpn/config \
  --name vpn dheaps/openvpn-client

Now, use the VPN tunnel by launching a container with the container:<vpn container name>". This replaces the container's network stack with the vpn container's network stack.

docker run \
  --network "container:vpn" \
  -it \
  alpine

For more advanced use cases, a docker-compose.yml file is recommended. See the examples/ folder to see how to expose a service attached to the VPN container and how to configure a firewall so only outbound traffic to the VPN is allowed.