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