🔍 Port Scanner

Scan network devices for open ports and identify potential security vulnerabilities

Version 2.1.0 - Updated September 2025
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Enter the IP address or hostname of the target you want to scan. Examples: 192.168.1.1, example.com, localhost
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Specify the port range to scan. You can use individual ports (80,443), ranges (1-1000), or combinations (80,443,8000-8080)
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Choose the type of port scanning technique to use. TCP Connect is the most reliable but slower.
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Common port ranges for different scanning purposes. Selecting a preset will update the port range.
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How long to wait for a response from each port before considering it closed or filtered.
1000 ms
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Number of ports to scan simultaneously. Higher values are faster but may trigger security systems.
10 threads
Security Level: Not Scanned
Scan results will appear here

Embed This Tool

Want to embed this port scanner on your website? Use this code:

<iframe src="https://yoursite.com/port-scanner" width="100%" height="700" frameborder="0"></iframe>

🎯 Port Scanning Examples & Common Ports

🌐 Common Web Ports

Essential ports for web services and applications:

Port 80: HTTP (Web traffic) Port 443: HTTPS (Secure web traffic) Port 8080: HTTP Alternate Port 8443: HTTPS Alternate

Security: Ensure these are properly secured with firewalls and encryption

📧 Email Service Ports

Ports used for email communication protocols:

Port 25: SMTP (Mail transfer) Port 110: POP3 (Mail retrieval) Port 143: IMAP (Mail access) Port 993: IMAPS (Secure IMAP) Port 995: POP3S (Secure POP3)

Security: Use encrypted variants (SMTPS, IMAPS) when possible

🔐 Remote Access Ports

Ports for remote administration and access:

Port 22: SSH (Secure Shell) Port 23: Telnet (Unencrypted remote) Port 3389: RDP (Remote Desktop) Port 5900: VNC (Virtual Network Computing)

Security: Always use SSH instead of Telnet for secure remote access

🗄️ Database Ports

Common database service ports:

Port 1433: MS SQL Server Port 1521: Oracle Database Port 3306: MySQL Database Port 5432: PostgreSQL Port 27017: MongoDB

Security: Never expose database ports directly to the internet

🎮 Gaming & Media Ports

Ports used by gaming and media applications:

Port 25565: Minecraft Port 27015: Steam/CS:GO Port 3074: Xbox Live Port 9987: TeamSpeak Port 1935: RTMP (Streaming)

Security: These are typically safe but monitor for unusual activity

⚡ System Service Ports

Essential system and network service ports:

Port 21: FTP (File Transfer) Port 53: DNS (Domain Name System) Port 67/68: DHCP (Dynamic Host Config) Port 161: SNMP (Network Management) Port 445: SMB (File Sharing)

Security: These services often have known vulnerabilities

📚 Port Scanning & Network Security Tutorials

🔍

Understanding Port Scanning Techniques

Learn about different port scanning methods and when to use each approach for effective network reconnaissance.

Read Tutorial →
🛡️

Network Security Fundamentals

Essential principles of network security and how to protect your systems from unauthorized access.

Read Tutorial →
⚡

Advanced Port Scanning with Nmap

Master the powerful Nmap tool for comprehensive network discovery and vulnerability assessment.

Read Tutorial →
🚫

Firewall Configuration Best Practices

How to properly configure firewalls to protect your network while maintaining necessary functionality.

Read Tutorial →
📊

Network Monitoring & Intrusion Detection

Implement effective network monitoring to detect and respond to security threats in real-time.

Read Tutorial →
🌐

Securing Network Services

Best practices for securing common network services like web servers, databases, and remote access.

Read Tutorial →

⚖️ Port Scanning Tools Comparison

Compare our free port scanner with other popular network scanning tools and services:

Feature Our Tool Nmap Online Scanner A Security Suite
Free to Use ✅ ✅ ✅ ❌ (Premium)
Browser-based ✅ ❌ ✅ ❌
Multiple Scan Types ✅ ✅ ✅ ✅
Custom Port Ranges ✅ ✅ ✅ ✅
Security Assessment ✅ ❌ ❌ ✅
Client-Side Scanning ✅ ✅ ❌ ✅
Mobile Friendly ✅ ❌ ✅ ✅
Educational Content ✅ ❌ ❌ ✅
Privacy (No data sent) ✅ ✅ ❌ ✅

Why Choose Our Port Scanner?

🔒 Complete Privacy

All scanning happens in your browser. Your target information never leaves your device, ensuring maximum privacy.

🎛️ Full Customization

Control every aspect of your scan - port ranges, scan types, timing, and concurrency settings.

📊 Security Assessment

Get detailed security level assessment with visual indicators and actionable recommendations.

🎓 Educational

Not just a tool - includes comprehensive guides, port references, and network security best practices.

📝 Version History & Changelog

Version 2.1.0 - Latest

September 15, 2025
  • 🎉 Added real-time progress tracking with visual progress bar
  • 📊 Enhanced scan statistics and performance metrics
  • 📱 Improved mobile responsiveness and touch interactions
  • 🔧 Added embed code functionality for easy integration
  • 📚 Expanded educational content and port references
  • 🎨 Updated UI with better accessibility and contrast

Version 2.0.0

August 20, 2025
  • 🔄 Complete UI redesign with modern styling
  • 📚 Added comprehensive tutorial section
  • 📝 Introduced tabbed navigation for better organization
  • ⚖️ Added tool comparison feature
  • 💾 Implemented detailed report generation
  • 📋 Enhanced copy functionality with better feedback

Version 1.2.0

July 10, 2025
  • ✅ Added multiple scan types (TCP, SYN, UDP, FIN)
  • 🛡️ Improved port detection and service identification
  • 📖 Added common port presets and service references
  • 🐛 Fixed hostname resolution issues
  • ♿ Enhanced accessibility with ARIA labels

Version 1.1.0

June 5, 2025
  • 🎨 Improved visual design with gradient backgrounds
  • 📱 Added responsive design for mobile devices
  • ⚠️ Added warnings for potentially intrusive scanning
  • 📋 Implemented one-click copy functionality
  • 🔧 Fixed timeout and concurrency issues

Version 1.0.0

May 15, 2025
  • 🎉 Initial release of Port Scanner
  • 🔐 Support for basic TCP port scanning
  • ⚡ Client-side processing for maximum privacy
  • 📚 Comprehensive documentation and examples
  • ✨ Clean, modern user interface

🔮 Upcoming Features

📋 Planned for Next Release:

  • Service version detection and banner grabbing
  • OS fingerprinting and device identification
  • Vulnerability assessment for common services
  • Network topology mapping
  • Dark/Light theme toggle
  • API for programmatic scanning
  • Integration with popular security frameworks

What is Port Scanning?

Port scanning is a technique used to discover open ports and available services on a network host. It's an essential tool for network administrators, security professionals, and penetration testers to assess network security and identify potential vulnerabilities.

🟢 Types of Port Scans

✅ Common Scanning Techniques:

  • TCP Connect Scan: Completes full TCP handshake - most reliable but easily detected
  • SYN Stealth Scan: Half-open scanning - faster and less detectable
  • UDP Scan: Checks for open UDP ports - slower and less reliable
  • FIN Scan: Sends FIN packets to bypass firewalls
  • XMAS Scan: Sends packets with FIN, URG, and PUSH flags set
  • NULL Scan: Sends packets with no flags set

🔴 Common Port Security Risks

❌ Vulnerable Services & Ports:

  • Open database ports exposed to the internet
  • Unencrypted remote access services (Telnet, FTP)
  • Outdated web servers with known vulnerabilities
  • Unnecessary services running with default credentials
  • File sharing services with weak permissions
  • Management interfaces accessible from untrusted networks

Port Scanning Impact and Importance

🔓 Security Assessment

Identify unnecessary open ports that could be exploited by attackers to gain unauthorized access.

📊 Network Inventory

Discover all active services and devices on your network for better management and monitoring.

🔄 Compliance Requirements

Regular port scanning is often required for security compliance standards like PCI DSS, HIPAA, and ISO 27001.

⚡ Incident Response

Quickly identify compromised systems and unauthorized services during security incidents.

How to Secure Your Network Ports

Protecting your network requires a comprehensive security approach:

  1. Firewall Configuration: Implement proper firewall rules to restrict unnecessary port access
  2. Service Hardening: Disable unused services and secure necessary ones with strong authentication
  3. Network Segmentation: Isolate critical systems in separate network segments
  4. Regular Updates: Keep all services and systems updated with security patches
  5. Monitoring & Logging: Implement network monitoring to detect scanning attempts and unauthorized access
  6. Security Testing: Conduct regular vulnerability assessments and penetration tests

Port Scanning Best Practices

Legal and Ethical Considerations

✅ Responsible Scanning:

  • Only scan networks you own or have explicit permission to test
  • Be aware of local laws and regulations regarding network scanning
  • Respect scan rate limits to avoid overwhelming target systems
  • Clearly document the scope and purpose of your scanning activities
  • Follow responsible disclosure practices when finding vulnerabilities in third-party systems

🔍 Recommended Network Security Tools

Enhance your network security with these trusted tools and platforms:

Nmap

Network Discovery & Security

Wireshark

Network Protocol Analyzer

Nessus

Vulnerability Scanner

pfSense

Firewall & Router

OpenVAS

Vulnerability Management