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Port Scanner

A basic Port Scanner 🔎 using Python with an Express Server to test!

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Note: Please follow this link if you're a GSSoC participant. Keep watching this repo, we'll be opening more beginner-friendly issues.

With this port scanner, I just attempt to connectThis is a form of "reconnaissance" for hackers and penetration testers at various ports, and do nothing else. If I'm able to connect to open ports, then I know at least the port is open.

Pre-requisites 🚨

node-current GitHub top language

  • Python >= v2.7.0

    • Install Python from here.
  • Node.js >= v0.10.0

    • Install Node.js from here.
  • Pip >= v9.0.1

    • Install pip from here.

How to run? 🚀

To run Port Scanner: (Via Terminal)

  • Open terminal and type npm install: This will install the dependencies (Express).

  • In the same terminal and type npm start: This will start multiple servers within the given range.

  • Open another terminal and type python src/scanner.py: Enter localhost or 127.0.0.1. It will scan all the ports and print the open ports.

Note: You can enter remote host if you want to scan the ports for any remote host. Check the DISCLAIMER.md before doing this.

To run Port Scanner: (Via UI)

Install flask

Make sure you have Python27\Scripts path added to your system's environment variables.

1. In PowerShell,

pip install flask

Install virtual environment

This step is required only if you are using Python2.7, skip this step when running Python3.X.

2. For Python 2, (via pip)

In PowerShell,

pip install virtualenv
virtualenv --help

Kindly check this if pip installation fails.

Create virtual environment

3. Create a venv folder inside src,

python -m virtualenv venv
\Python27\Scripts\virtualenv.exe venv

Activate the virtual environment

4. Activate venv,

venv\Scripts\activate

5. Run mainScanner.py,

pip install flask
python src/mainScanner.py

6. Go to the port url returned by your terminal.

To run IP Scanner:

  • Open terminal and type python src/ipscanner.py: Enter any IP address XXX.XXX.XXX.YYY. It will scan all the addresses in the range XXX.XXX.XXX.0 to XXX.XXX.XXX.255 and print the addresses which are live.

Configuration ⚙️

The servers are opened at multiple ports, you can change the low range and high range for the ports to be listened by the Express server.

{
    "range": {
        "low": "1",
        "high": "8888"
    },
    "ipRange": {
        "low": "0",
        "high": "255"
    },
    "count": "10",
    "thread": { 
        "count": 8
    }
}
  • range.low: lowest port number (inclusive)
  • range.high: highest port number (exclusive)
  • ipRange.low: lowest IP address range (inclusive)
  • ipRange.high: highest IP address range (inclusive)
  • count: total number of ports
  • thread.count: total number of concurrent threads

Contributing 🤝

PRs Welcome CodeFactor Open Source Love

Please read our Code of Conduct.

We're accepting PRs for our open and unassigned issues. Please check CONTRIBUTING.md. We'd love your contributions! Kindly follow the steps below to get started:

1. Fork this repository.

2. Clone the forked repository.

git clone https://github.com/<your-github-username>/PortScanner

3. Navigate to the project directory.

cd PortScanner

4. Create a new branch.

git checkout -b <your_branch_name>

5. Make changes in source code.

6. Stage your changes and commit

git add .

git commit -m "<your_commit_message>"

7. Push your local commits to the remote repo.

git push -u origin <your_branch_name>

8. Create a PR to develop !

9. Congratulations! 🎉 Sit and relax, you've made your contribution to Port Scanner project. ✌️ ❤️

Branching 🚧

  • master branch is maintained and tested regulary for Python 2.

  • Please checkout feature/python3.8 if you're using Python 3.

git checkout feature/python3.8

Need for Multithreading ✅

The ability of a process to execute multiple threads parallelly is called multithreading. Ideally, multithreading can significantly improve the performance of any program.

Imagine scanning substantial number of ports(range.high = 8888) consecutively. The process would require quite a long time.

This calls for the need of concurrency in different parts of this range(1-8888). That is, running different parts(1-1111, 1112-2222, 2223-3333...) of the same process at the same time. This would reduce the time required for completion by significant amount. The reduction in time can be related to the number of concurrent ranges(threads) being scanned simultaneously. Checkout the Performance Analysis for a follow up.

Performance using threads 🎯

  • src/single/scanner.py: Scanner without thread
  • src/scanner.py: Scanner with multi threads
Range(low-high) src/single/scanner.py (in milliseconds) src/scanner.py (in milliseconds)
1-80 143243 30862

CONST_NUM_THREADS : 8

Performance on the basis of number of threads 📉

Range of ports: 1-80

Number of threads Execution time (in milliseconds) Compared Performances
2 71627 50 % faster
4 40808 71.51 % faster
8 37003 74.17 % faster
16 36870 74.26 % faster
32 32674 77.19 % faster

Performance Analysis

Performance Analysis

Blog

Medium Story

Open Source Programs

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Useful resources 📚

  • Express: Node.js web framework used for creating server. Check server/index.js
  • Socket: Low-level networking interface in Python. Check src/scanner.py
  • Threading: Thread-based parallelism in python. Check src/scanner_thread.py
  • Flask: A micro web framework written in Python. Check src/mainScanner.py

GitHub issues GitHub pull requests

Name 🎖️ Social Media 👋 GitHub :octocat:
Vinit Shahdeo 🐦 Twitter
🎓 LinkedIn
@vinitshahdeo
Kashish 🐦 Twitter
🎓 LinkedIn
@Kashish121
Ishika Dubey 🐦 Twitter
🎓 LinkedIn
@ishika1727

See the contribution graph here.

Admin

Vinit Shahdeo

License

FOSSA Status

TL;DR

Check out this gist if you're only looking for a Python script for scanning ports.


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This repository is intended for individuals to test their own equipment for weak security, and the author(@vinitshahdeo) will take no responsibility if it is put to any other use. Check DISCLAIMER.md

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