Port scanning with Nmap in Cybersecurity - Mini Project: Build & Apply

Port scanning with Nmap

📖 Scenario: You are a network administrator who needs to check which ports are open on a server to ensure security and proper service operation.

🎯 Goal: Learn how to perform basic port scanning using the nmap tool to identify open ports on a target machine.

📋 What You'll Learn

Understand what a port is and why scanning ports is useful

Use nmap to scan a specific IP address

Use nmap to scan a range of ports

Interpret the basic output of nmap scans

💡 Why This Matters

🌍 Real World

Network administrators and cybersecurity professionals use port scanning to check which services are accessible on a server and to identify potential security risks.

💼 Career

Understanding how to perform and interpret port scans is essential for roles in network security, system administration, and ethical hacking.

1

Set up the target IP address

Create a variable called target_ip and set it to the string "192.168.1.1", which represents the IP address of the server you want to scan.

Cybersecurity

# Create the target IP address
# Your code here

Need a hint?

The IP address should be a string assigned to the variable target_ip.

2

Set up the port range to scan

Create a variable called port_range and set it to the string "1-1000", which defines the range of ports you want to scan on the target IP.

Cybersecurity

target_ip = "192.168.1.1"
# Define the port range to scan
# Your code here

Need a hint?

The port range should be a string assigned to the variable port_range.

3

Write the Nmap scan command

Create a variable called scan_command and set it to the string that runs nmap with the -p option for ports, scanning the port_range on the target_ip. Use the format: "nmap -p {port_range} {target_ip}" with f-string syntax.

Cybersecurity

target_ip = "192.168.1.1"
port_range = "1-1000"
# Create the nmap scan command string
# Your code here

Need a hint?

Use an f-string to insert port_range and target_ip into the command string.

4

Explain the purpose of the scan command

Add a comment above the scan_command variable explaining that this command will scan ports 1 to 1000 on the target IP address to find which ports are open.

Cybersecurity

target_ip = "192.168.1.1"
port_range = "1-1000"
# Add a comment explaining the scan command
# Your code here
scan_command = f"nmap -p {port_range} {target_ip}"

Need a hint?

The comment should clearly state the purpose of the scan_command.