Docker Reversed SSH Tunnel

Create a lightweight Alpine Linux based SSH tunnel to a host. Uses pure SSH, no fluff.

Image source & learn more about ssh tunneling here

FORKED FROM jujhars13/docker-ssh-tunnel but reversed the tunnel direction.

Perks

• Stay up to date (with monthly builds that ensure that OpenSSH is up to date)

• Lightweight

• Easy to use

• No need to install anything on the host or the client

Required Parameters

Variable	Description	default
SSH_PORT	Port number for SSH	22
SSH_USER	Username for the SSH connection	root
LOCAL_IP	IP address of the target you want to expose	127.0.0.1
LOCAL_PORT	The port you want to expose on the target	80
GATEWAY_IP	IP/Domain of the machine that will expose your app (the host)	(required)
REMOTE_PORT	Which port should sshd listen from on the gateway	80
REMOTE_IP	Which IP should sshd listen from on the gateway (* for all)	*

Note: Remember to inject/mount your private SSH key into the container to /ssh_key.

Repos

• gcr.io: docker pull gcr.io/kalitsune/docker-reversed-ssh-tunnel
• Docker Hub: docker pull kalithekitsune/docker-reversed-ssh-tunnel

Example

please refer to the examples/docker-compose.yml file for an example.

Recommandations

if you want to use an open-ssh docker container as the gatewway, you can use this linux-server.io image mod