Noumenon is a directory and subdomain enumeration tool built with Ruby on Rails, Redis, and Sidekiq. It scans and validates subdomains, directories, links, and emails — and takes screenshots of every subdomain and directory it finds.

🛠️ Features:

• Subdomain + directory enumeration

• Email and link extraction

• Screenshot capture (headless Chrome)

• Queue-based architecture with Redis + Sidekiq

• Dark-themed web UI

• Docker support:

  :latest (~210MB) full version with screenshots
  
  :slimmed (~90MB) minimal version without screenshot feature
  

Docker image

1 - Running with Docker (recommended):

Install docker:

sudo apt update
sudo apt install -y docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
sudo systemctl enable docker
sudo systemctl start docker

Copy the code below and name as docker-compose.yml

version: '3.8'
services:
  redis:
    image: redis:latest
    container_name: redis_container
    ports:
      - "6379:6379"

  app:
    image: johnermac/noumenon:latest #use :slimmed (90mb) if you're not gonna use the screenshot option
    container_name: rails_app
    environment:
      - RAILS_ENV=development
      - REDIS_URL=redis://redis:6379/0
    depends_on:
      - redis
    ports:
      - "3000:3000"

Now just: docker-compose up --build

It'll grab the images and start the app, when finish'd u can access the localhost:3000

I'd recommend to use the 'Scan Directory' by itself because it takes 20~30 min to finish. The others Scans are very fast.

Open your browser and visit: http://localhost:3000

Hope you find it useful – feedback and suggestions are welcome!