Host-Scan

This Bash script is a basic network scanner that checks for active hosts within a specified subnet. It attempts to ping each IP address in the range 192.168.1.1 to 192.168.1.254 to identify active hosts on the network. The script handles interruptions and exits gracefully.

Features

• Subnet Scanning: Pings each IP address from 192.168.1.1 to 192.168.1.254.
• Concurrency: Scans multiple IPs concurrently to speed up the process.
• Signal Handling: Captures Ctrl+C to exit gracefully and display a custom exit message.
• Timeout for Pings: Uses a timeout of 1 second per ping to avoid long delays on inactive hosts.

Requirements

This script uses basic Bash commands and requires ping and timeout, which are typically available on most Linux systems.

Usage

To run the script, simply execute it from the terminal:

./host_discovery.sh

How It Works

• IP Looping: The script loops through IPs from 192.168.1.1 to 192.168.1.254.
• Ping Check: For each IP, it attempts a single ping with a 1-second timeout. If the host responds, it is marked as active.
• Concurrency: Each ping check runs in a background process, allowing multiple IPs to be scanned simultaneously.
• Signal Handling: If Ctrl+C is pressed, the ctrl_c function is called, displaying an exit message and stopping the script.

Notes

• This script is designed for quick discovery of active hosts on a local network. For comprehensive network scanning, consider using tools like nmap.
• Warning: Ensure you have permission to scan any network, as unauthorized network scanning may be illegal in certain locations.