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Minimal VPN Tunnel Appliance

Connects to a VPN Tunnel using Racoon on Alpine Linux

This has not been vetted for production use, and exists to test AWS VPN configurations prior to the installation of long-term solutions.

Theoretically, this could be used with other (non-AWS) ipsec tunnels, but only ipsec gateways on AWS have been tested.

Basic Usage

docker run \
    -e VPN_TUNNEL_NETWORKS=<netmask of private VPC subnet, eg: 10.0.0.0/16> \
    -e VPN_TUNNEL_ADDR=<public routable address of the AWS VPN Connection Tunnel> \
    -v <a file containing only the Pre-Shared Key of the VPN Tunnel>:/vpn-psk \
    --cap-add=NET_ADMIN \
    -d jorgebonilla/racoon

You may either use docker exec to run processes within the tunnel, or tell your host (or other containers) to route connections to the private VPC subnet through the container.

Example routing rule:

sudo route add -net 10.0.0.0 netmask 255.255.0.0 gw 172.17.0.7 dev docker0

note: you may need to modprobe esp4 to ensure that the ipsec tunnels used by racoon are supported by your kernel.

Environment Variables

VPN_TUNNEL_NETWORKS=<netmask of private VPC subnet, eg: 10.0.0.0/16>
VPN_TUNNEL_ADDR=<public routable address of the AWS VPN Connection Tunnel>
VPN_MY_ADDR=<ip address of private Docker container, eg: 172.17.0.7>
VPN_MY_NETWORKS=<netmask of private Docker subnet, eg: 172.17.0.0/16>
VPN_MY_INTERFACE=<name of device to attach to, eg: eth0>
RACOON_ARGS=<arguments to pass to racoon, eg: -F>