autossh

Website: https://linux.die.net/man/1/autossh

Ansible role

Use Ansible Build to setup an autossh tunnel.

Link: https://ansible.build/roles/autossh/

Here are some examples.

Forward SSH Tunnel with Jumphost

For localhost setup:

local_user: 'debian'
local_key_file: '/home/debian/.ssh/id_ed25519'
local_interface: '0.0.0.0'
local_port: '8080'
ssh_user: 'debian'
ssh_server: 'jump.example.com'
remote_ssh_port: '2222'
remote_server: 'remote.example.com'
remote_port: '80'

graph TD
    A[localhost:8080] -->|ssh tunnel| B[debian @ jump.example.com:2222]
    B -->|forward to| C[remote.example.com:80]

    style A fill:#e8f5e8
    style B fill:#fff3e0
    style C fill:#ffe8e8

Reverse SSH Tunnel with Jumphost

For remote server setup:

local_user: 'autossh'
local_key_file: '/home/autossh/.ssh/id_ed25519'
local_interface: 'localhost'
local_port: '22'
ssh_user: 'autossh'
ssh_server: 'jump.example.com'
remote_ssh_port: '2222'
remote_server: '0.0.0.0'
remote_port: '2223'

graph TD
    A[remote.example.com] -->|ssh tunnel| B[autossh @ jump.example.com:2222]
    B -->|reverse tunnel| C[jump.example.com:2223]
    D[localhost] -->|ssh| C

    style A fill:#ffe8e8
    style B fill:#fff3e0
    style C fill:#fff3e0
    style D fill:#e8f5e8