Building Open Source Cybersecurity Tools with Python

Introduction

Cybersecurity and open source have always gone hand in hand.
Recently, I've been working on several small tools focused on reconnaissance, OSINT, and security research.

Most of these tools are written in Python and designed to be simple, practical, and useful for researchers, developers, and bug bounty hunters.

Why I Built These Tools

While learning more about reconnaissance workflows, I noticed that many tools are either:

too complex for beginners

not flexible enough

or difficult to integrate into simple workflows

So I started building my own tools to experiment with automation and information gathering.

Some of My Projects

hxr

A security reconnaissance framework focused on gathering useful data during early stages of security research.

RYN27

A CLI tool for information gathering including:

WHOIS lookup

DNS records

IP geolocation

port scanning

technology detection

IP-Hunter

A defensive security tool designed to help website owners identify potential risks and misconfigurations.

Open Source and Learning

All of these projects are open source and part of my learning process in cybersecurity and Python development.

I believe sharing tools openly helps others learn and improve their workflows.

Projects

You can explore all projects here:

GitHub:
https://github.com/ruyynn

Feedback

If you work in cybersecurity, OSINT, or bug bounty, I’d love to hear your feedback.

What tools do you rely on the most?

What features are often missing from reconnaissance tools?

Suggestions are always welcome.