Port Scanner (Simulated)

Web browsers implement strict security policies that prevent JavaScript from making arbitrary network connections to other domains or ports.

The Same-Origin Policy (SOP) restricts how a document or script loaded from one origin can interact with a resource from another origin.

Additionally, browsers block access to most ports for security reasons, only allowing common web ports like 80 (HTTP) and 443 (HTTPS).

Real port scanning tools like Nmap operate outside the browser environment and can:

• Send raw network packets
• Connect to any port on a target system
• Analyze responses to determine port status
• Perform advanced scanning techniques

These capabilities are not available in browser-based JavaScript due to security constraints.

This tool demonstrates what port scanning results might look like without actually performing any network scans. It's designed to:

• Help understand common port assignments
• Illustrate how port scanners present information
• Explain browser security limitations
• Provide a safe environment to learn about network concepts