How to Build a Simple Network Port Scanner in Python Using an Android Phone

lagendary revanges — Tue, 10 Nov 2026 12:02:44 +0000

In cybersecurity, a port scanner is a fundamental tool used to discover open entry points on a network system. While most people use a computer, you can actually build and run a functional network scanner right on your smartphone using a Linux environment.

Since Python is a powerful language for security automation, we can combine it with Termux to scan network targets on the go.

Prerequisites

To follow along with this tutorial on your mobile device, you only need:

Termux app installed on your phone.
Python and a text editor installed via the command: pkg install python nano -y

The Python Script (`scanner.py`)

Here is the clean script that utilizes Python's built-in socket library to attempt network connections on standard ports:

import socket

target = "scanme.nmap.org" 
ports_to_scan = [22, 80, 443]

print(f"Starting basic mobile scan on target: {target}\n")

for port in ports_to_scan:
    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    s.settimeout(2.0)
    result = s.connect_ex((target, port))

    if result == 0:
        print(f"[+] Port {port} is OPEN!")
    else:
        print(f"[-] Port {port} is closed.")
    s.close()

How It Works

socket.socket: Creates a network endpoint to communicate.
s.settimeout(2.0): Prevents the script from hanging forever if a port is tightly secured or filtered.
s.connect_ex: Attempts the connection. If it returns a value of 0, the connection succeeded, meaning the port is listening (OPEN).

Running the Scan on Mobile

Once saved inside your Termux terminal via nano scanner.py, run the tool using:
python scanner.py

This gives you a powerful, portable tool to quickly assess a domain's basic web setup right from your pocket!

5 Essential Linux Commands Every Beginner Should Know

lagendary revanges — Tue, 10 Nov 2026 11:05:29 +0000

When you first start using the Linux terminal, the blank screen can feel intimidating. However, learning just a few basic commands can give you full control over navigating your system.

Here are 5 essential Linux commands every beginner should learn.

1. pwd (Print Working Directory)

When working in the command line, it is easy to forget where you are. The pwd command prints the absolute path of your current directory.

Command: pwd
Output example: /home/user/documents

2. ls (List Files and Directories)

To see all the files and folders inside your current directory, use ls.

Command: ls
Tip: Use ls -l to see extra details like file size, permissions, and modification date.

3. cd (Change Directory)

Use cd to move into a different folder.

Command: cd Documents
To go back up one folder level, type: cd ..

4. mkdir (Make Directory)

Need to create a new folder? The mkdir command creates a directory instantly.

Command: mkdir MyNewFolder

5. clear (Clear the Screen)

When your terminal gets cluttered with text and output, clear wipes the terminal window clean so you can focus.

Command: clear

Conclusion

Mastering these 5 core commands builds a strong foundation for using Linux. Try running them one by one in your terminal to practice!

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