SubNetter: A Powerful Subnetting and VLSM Calculator

Subnetter is a command-line tool written in Python that simplifies subnet calculations and VLSM (Variable Length Subnet Masking) design. Whether you're a network engineer, IT professional, or student learning about networking, SubNetter provides the tools you need to work with IP addresses and subnets efficiently.

Features

• Subnet Calculation: Calculate subnet mask, network address, broadcast address, usable IP range, and more for a given network address in CIDR notation.
• VLSM (Variable Length Subnet Masking): Design and allocate subnets of varying sizes based on specific host requirements.
• Table Output: Display VLSM results in an organized table format using the tabulate package (optional).
• Error Handling: Provides clear error messages for invalid inputs or insufficient address space.

Installation

1. Prerequisites: Make sure you have Python 3.6 or higher installed on your system.
2. Install tabulate (optional): If you want to use table output, install the tabulate package:

   pip install tabulate

3. Clone the Repository:

   git clone https://github.com/0xShakhawat/subnetter.git

Usage

python3 subnetter.py <network_address> [-s <subnet_host_counts>] [-t]

• <network_address>: The base network address in CIDR notation (e.g., 192.168.1.0/24).
• -s <subnet_host_counts> (optional): A comma-separated list of required host counts for each subnet (for VLSM calculations).
• -t (optional): Display the VLSM results in a table format (requires the tabulate package).

Examples:

• Calculate a single subnet:

  python3 subnetter.py 192.168.1.0/24

• Calculate VLSM subnets:

  python3 subnetter.py 192.168.1.0/24 -s 60,40,20,10,5,2

• Calculate VLSM subnets and display results in a table:

  python3 subnetter.py 192.168.1.0/24 -s 60,40,20,10,5,2 -t

Want Even More Features?

Check out the Subnetter app on the Play Store!

https://play.google.com/store/apps/details?id=me.shakhawat.subnetter

The SubNetter app offers:

• User-Friendly Interface: A graphical user interface for easier input and calculations.
• Additional Tools: Includes a IP Class Detector, IP to Binary, Base Converter, CIDR Notation Converter, Wildcard Mask Calculator, Ping, and Traceroute tools.
• Subnetter Academy: Interactive lessons and quizzes to help you master networking fundamentals.

License

This project is licensed under the MIT License - see the LICENSE file for details.

Author

• Shakhawat Hossain (@0xShakhawat)

Let me know if you have any questions!