Network Port Scanner
Scan common ports on any host to check for open services. Useful for security auditing, troubleshooting, and network discovery.
Quick Targets
scanme.nmap.org (Test)
google.com
github.com
Local Router
localhost
About Port Scanning
Port scanning is used to discover which services are running on a network host. Each open port represents a potential service that could be vulnerable to attack. Understanding open ports is essential for network security and troubleshooting.
Common Ports and Services
| Port | Protocol | Service | Description |
|---|---|---|---|
| 21 | TCP | FTP | File Transfer Protocol |
| 22 | TCP | SSH | Secure Shell |
| 23 | TCP | Telnet | Unencrypted remote access |
| 25 | TCP | SMTP | Email sending |
| 53 | TCP/UDP | DNS | Domain Name System |
| 80 | TCP | HTTP | Web (unencrypted) |
| 110 | TCP | POP3 | Email retrieval |
| 143 | TCP | IMAP | Email retrieval |
| 443 | TCP | HTTPS | Web (encrypted) |
| 445 | TCP | SMB | Windows file sharing |
| 993 | TCP | IMAPS | Secure IMAP |
| 995 | TCP | POP3S | Secure POP3 |
| 3306 | TCP | MySQL | MySQL database |
| 3389 | TCP | RDP | Remote Desktop |
| 5432 | TCP | PostgreSQL | PostgreSQL database |
| 6379 | TCP | Redis | Redis database |
| 8080 | TCP | HTTP-Alt | Alternative web port |
| 8443 | TCP | HTTPS-Alt | Alternative SSL port |
Port States
- Open: An application is accepting connections on this port
- Closed: No application is listening, but the port is reachable
- Filtered: Firewall or filter is blocking the port
- Unfiltered: Port is reachable but state unknown
Note: Port scanning without permission may be illegal. Only scan systems you own or have explicit permission to test.