Reference Database
This tool provides information about common network ports and their services. To scan for open ports on a system, use tools like nmap, netstat, or specialized network scanners.
| Port | Protocol | Service | Description | Category | Security |
|---|---|---|---|---|---|
Loading ports... | |||||
Security Indicator Legend
Common Port Groups
Security Best Practices
- •Never expose database ports (3306, 5432, 1433, 27017, 6379) to the internet. Use SSH tunnels or VPNs.
- •Disable legacy protocols like Telnet (23), FTP (21), and HTTP (80) in favor of encrypted alternatives.
- •Use firewalls to restrict access to only necessary ports and trusted IP addresses.
- •Enable authentication on all services, especially those that default to no auth (Redis, Memcached, MongoDB).
- •Regularly audit open ports using tools like nmap, netstat, or ss to identify unexpected services.
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Frequently Asked Questions
Common questions about the Port Reference
Well-known ports are port numbers 0-1023 assigned by IANA to specific services. Examples include: 22 (SSH), 23 (Telnet), 25 (SMTP), 53 (DNS), 80 (HTTP), 443 (HTTPS), 3389 (RDP). These ports require root/administrator privileges to bind on Unix-like systems.
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ℹ️ Disclaimer
This tool is provided for informational and educational purposes only. All processing happens entirely in your browser - no data is sent to or stored on our servers. While we strive for accuracy, we make no warranties about the completeness or reliability of results. Use at your own discretion.