SSH-Forwarder-Server image

This image opens an ssh server which allows only permitted TCP forwarding connections.

This is especially useful in combination with the ssh-forwarder image to connect services across different machines via a secure ssh connection.

Installation

1. Pull from Docker Hub, download the package from Releases or build using builder/build.sh

Usage

Environment variables

• AUTHORIZED_PUBLIC_KEYS
  • Public keys with access to the ssh server. For example ssh-rsa AAAAB3Nz... user@example.madebytimo.de. This will overwrite the authorized_keys file.
• HOST_KEY
  • Host key to use for the ssh server. This will overwrite the host_key file.
• PERMIT_LISTEN
  • The allowed addresses to listen in the format HOST:PORT or PORT.
• PERMIT_OPEN
  • The allowed destinations to open in the format HOST:PORT.

Volumes

• /media/ssh/authorized_keys
  • Public keys with access to the ssh server.
• /media/ssh/host_key
  • Host key to use for the ssh server.

Development

To build run the docker container for development execute:

docker compose --file docker-compose-dev.yaml up --build