🥷🧱Building a Simple Packet Filter Firewall With Linux Kernel Modules

I'm excited to share a recent project I worked on: a Linux Kernel Module (LKM) that acts as a basic packet filter firewall, specifically designed to block outgoing packets to port 22 (SSH). 🔐

What I Did:

- Objective: Enhance network security by preventing unauthorized SSH traffic from leaving the system.

- Solution: Developed a custom LKM using the Netfilter framework to intercept and filter outgoing packets.

- Key Functionality: The module inspects outgoing packets, and if it detects a packet destined for port 22, it drops the packet, effectively blocking the connection.

🤔Why This Matters:

Blocking unauthorized SSH traffic can be a crucial step in preventing potential security breaches, especially in environments where SSH access needs to be tightly controlled. This simple yet effective module demonstrates how kernel-level programming can be leveraged to enhance system security.

THE SOURCE CODE IS AVAILABLE ON MY GITHUB REPO: https://github.com/Hotwrist/sshFilter

If you're interested in discussing kernel programming, network security, or collaborating on similar projects, feel free to connect or drop a comment! 😊

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