Port Scanner
Educational port scanner for learning about network services and security. Check common ports and learn about network protocols.
Target Configuration
Scan Results
Port Details
Well-Known Ports
System Ports (1-1023)
| Port | Service | Protocol |
|---|---|---|
| 21 | FTP | TCP |
| 22 | SSH | TCP |
| 23 | Telnet | TCP |
| 25 | SMTP | TCP |
| 53 | DNS | TCP/UDP |
| 80 | HTTP | TCP |
| 110 | POP3 | TCP |
| 143 | IMAP | TCP |
| 443 | HTTPS | TCP |
| 993 | IMAPS | TCP |
Registered Ports (1024-49151)
| Port | Service | Protocol |
|---|---|---|
| 1433 | SQL Server | TCP |
| 1521 | Oracle DB | TCP |
| 3306 | MySQL | TCP |
| 3389 | RDP | TCP |
| 5432 | PostgreSQL | TCP |
| 5900 | VNC | TCP |
| 6379 | Redis | TCP |
| 8080 | HTTP Alt | TCP |
| 8443 | HTTPS Alt | TCP |
| 9200 | Elasticsearch | TCP |
Service Categories
Web Services
- 80: HTTP
- 443: HTTPS
- 8080: HTTP Alternate
- 8443: HTTPS Alternate
- 3000: Development Server
Database Services
- 3306: MySQL
- 5432: PostgreSQL
- 1521: Oracle
- 1433: SQL Server
- 27017: MongoDB
Remote Access
- 22: SSH
- 23: Telnet
- 3389: RDP
- 5900: VNC
- 5901: VNC (Alt)
Email Services
- 25: SMTP
- 110: POP3
- 143: IMAP
- 587: SMTP (TLS)
- 993: IMAPS
File Transfer
- 21: FTP
- 22: SFTP
- 69: TFTP
- 989: FTPS
- 990: FTPS
Network Services
- 53: DNS
- 67: DHCP Server
- 68: DHCP Client
- 123: NTP
- 161: SNMP
What is Port Scanning?
Port scanning is a technique used to discover open network ports on a host or server. It's commonly used for network troubleshooting, security auditing, and service discovery.
Common Scan Types:
- TCP Connect: Full connection to target port
- SYN Scan: Half-open scan technique
- UDP Scan: Scans UDP protocol ports
- Stealth Scan: Attempts to avoid detection
Security Considerations
Port scanning can be used for both legitimate and malicious purposes. Understanding port scanning helps improve network security.
Best Practices:
- Only scan networks you own or have permission to test
- Close unnecessary open ports
- Use firewalls to filter unwanted traffic
- Monitor network logs for suspicious activity
Popular Scanning Tools
Professional network administrators use various tools for port scanning and network analysis.
Common Tools:
- Nmap: Network discovery and security auditing
- Masscan: High-speed port scanner
- Netcat: Network utility for various tasks
- Telnet: Simple connectivity testing
Legal Notice
Port scanning should only be performed on networks you own or have explicit permission to test.