explaingit

moritzheiber/sshd-mock

Analysis updated 2026-07-09 · repo last pushed 2017-01-11

1GoAudience · developerComplexity · 2/5DormantSetup · easy

TLDR

A tiny fake SSH server written in Go that pretends to accept SSH connections. It exists purely for testing software that needs to connect to an SSH server, without the overhead of a real one.

Mindmap

mindmap
  root((repo))
    What it does
      Fake SSH server
      Pretends to accept connections
      Does nothing meaningful
    Use cases
      Test deployment tools
      Automated test suites
      Mock SSH connections
    Tech stack
      Go
      Docker
    Audience
      Developers
      Test infrastructure
    Setup
      Prebuilt Docker image
      Single command to run
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What do people build with it?

USE CASE 1

Point your test suite at this mock SSH server to verify connection logic without managing real credentials.

USE CASE 2

Run automated integration tests for tools that deploy code over SSH.

USE CASE 3

Drop into a CI test pipeline as a lightweight stand-in for a real SSH server.

What is it built with?

GoDocker

How does it compare?

moritzheiber/sshd-mockashutosh-swain-git/dahmeraudriusbutkevicius/gohashcompare
Stars111
LanguageGoGoGo
Last pushed2017-01-112016-07-09
MaintenanceDormantDormant
Setup difficultyeasyeasymoderate
Complexity2/51/52/5
Audiencedeveloperdeveloperdeveloper

Figures from each repo's GitHub metadata at analysis time.

How do you get it running?

Difficulty · easy Time to first run · 5min

Just pull the prebuilt Docker image and run it with a single command, no Go installation or compilation needed.

In plain English

sshd-mock is a tiny fake SSH server. Real SSH servers let you securely log into a remote machine and run commands, but this one doesn't actually do anything meaningful, it just pretends to be an SSH server so you can test software that needs to talk to one. It exists for situations where you want to run automated tests against something that connects via SSH, without spinning up a full server with real credentials, real user accounts, and real security implications. For example, if you're building a tool that deploys code to servers over SSH, you could point your test suite at this mock server to make sure your tool's connection logic works, without the overhead of managing a real server environment. The project is written in Go and is designed to be as minimal as possible. The README doesn't go into detail about what the mock server actually responds with or how it behaves when you connect, it simply describes it as "small and dumb." There's a prebuilt Docker image available, which means you can run it with a single command without installing Go or compiling anything yourself, which is convenient for dropping into a test pipeline. The audience here is likely developers who need a lightweight stand-in for an SSH server in their test infrastructure. It's not something you'd use in production or for any real work, it's purely a testing convenience. The fact that it only has one star and a very sparse README suggests it's a personal utility that the author shared publicly rather than a polished, maintained project with documentation and support.

Copy-paste prompts

Prompt 1
Help me write a Go test that connects to sshd-mock running in Docker on localhost:2222 and verifies my SSH client can establish a connection.
Prompt 2
I want to add sshd-mock as a service in my GitHub Actions workflow so my test suite has a fake SSH server to connect to. Write the YAML service block.
Prompt 3
Write a shell script that starts the sshd-mock Docker container, runs my deployment tool against it, and then shuts the container down after tests finish.

Frequently asked questions

What is sshd-mock?

A tiny fake SSH server written in Go that pretends to accept SSH connections. It exists purely for testing software that needs to connect to an SSH server, without the overhead of a real one.

What language is sshd-mock written in?

Mainly Go. The stack also includes Go, Docker.

Is sshd-mock actively maintained?

Dormant — no commits in 2+ years (last push 2017-01-11).

How hard is sshd-mock to set up?

Setup difficulty is rated easy, with roughly 5min to a first successful run.

Who is sshd-mock for?

Mainly developer.

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