Network Isolation Lab is a Python-based cybersecurity research project demonstrating how network packets can be intercepted and blocked using Linux NetfilterQueue.
The project serves as a minimal proof-of-concept for understanding packet filtering, firewall behavior, and network isolation techniques in a controlled laboratory environment.
This repository is intended for educational purposes and defensive cybersecurity research only.
- Intercepts packets using NetfilterQueue
- Demonstrates packet dropping
- Simple and lightweight implementation
- Useful for learning Linux packet processing
- Foundation for advanced firewall and IDS research
- Python 3
- NetfilterQueue
- Linux
- iptables
network-isolation-lab/
│
├── net_cut.py
└── README.md
- Python 3
- Linux
- Root privileges
- NetfilterQueue
- iptables
Install the dependency:
pip install NetfilterQueueConfigure an iptables rule to forward packets to NetfilterQueue, then run:
sudo python3 net_cut.pyThe script will intercept packets from Queue 0 and drop them.
This project demonstrates:
- Linux packet processing
- NetfilterQueue integration
- Packet filtering
- Firewall fundamentals
- Network isolation concepts
- Defensive security research
This software is intended exclusively for:
- cybersecurity education
- defensive research
- laboratory testing
- authorized security assessments
Do not deploy or use this software on networks you do not own or have explicit permission to test.
- Configurable filtering rules
- CLI arguments
- Packet logging
- Selective packet blocking
- Protocol-specific filtering
- Statistics dashboard
- Unit tests
Rhema Great
GitHub: https://github.com/RhemaGreat
This project is licensed under the MIT License.