Jumpbox Docker container

• Debian slim based image
• OpenSSH server
• User/group creation on startup

Supported tags and respective Dockerfile links

• latest

Usage

Environment variables

Key	Format	Description
ROOT_AUTHORIZED_KEYS	/path/to/file	Path to file that contains the public SSH keys that can be used for root user authentication. This file will be copied to /root/.ssh/authorized_keys
HOSTKEYS	/path/to/hostkey;...	Specifies a (semi-colon separated list of) file(s) containing a private host key used by SSH.
USERADD	{username}:{uid}:{gid}:{shell};...	Create user account(s) on startup
GROUPADD	{groupname}:{gid};...	Create group account(s) on startup
BASE_DIR	/home	Basedir used for user account creation (Default: /home)

docker run

$ docker run -it \
    --name jumpbox \
    -v $(pwd)/jumpbox:/var/lib/jumpbox \
    -e "ROOT_AUTHORIZED_KEYS=/var/lib/jumpbox/authorized_keys" \
    -e "HOSTKEYS=/var/lib/jumpbox/ssh_host_ed25519_key;/var/lib/jumpbox/ssh_host_rsa_key" \
    -e "USERADD=jumpbox:1000:1000:/bin/bash" \
    -e "GROUPADD=jumpbox:1000" \
    -p 1022:22 \
    pommib/jumpbox:latest

docker-compose

version: "3"

services:
  jumpbox:
    container_name: jumpbox
    image: pommib/jumpbox:latest
    ports:
      - "1022:22/tcp"
    volumes:
      - '${PWD}/jumpbox:/var/lib/jumpbox'
    environment:
      ROOT_AUTHORIZED_KEYS: /var/lib/jumpbox/authorized_keys
      HOSTKEYS: /var/lib/jumpbox/ssh_host_ed25519_key;/var/lib/jumpbox/ssh_host_rsa_key
      USERADD: jumpbox:1000:1000:/bin/bash
      GROUPADD: jumpbox:1000

Login as root

$ ssh -l root 127.0.0.1 -p 1022

Login as jumpbox

To login as user jumpbox, make sure /home/jumpbox is a mounted volume containing .ssh/authorized_keys containing your public key.

$ ssh -l jumpbox 127.0.0.1 -p 1022