(https://github.com/skeeto/endlessh) Endlessh is an SSH tarpit that very slowly sends an endless, random SSH banner. It keeps SSH clients locked up for hours or even days at a time. The purpose is to put your real SSH server on another port and then let the script kiddies get stuck in this tarpit instead of bothering a real server. endlessh-go (https://github.com/shizunge/endlessh-go) is a golang implementation of endlessh with additional features including exporting Prometheus metrics.

A Prometheus instance is required in order to collect exported metrics. See the support thread for setup.