Network Ports Intelligence Hub
Network ports act as communication endpoints for different services and protocols. Understand the security risks, default assignments, and defensive configurations for all major TCP and UDP ports.
Most Scanned Ports
Port 21
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Port 22
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Port 23
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Port 25
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Port 53
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Port 80
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Port 110
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Port 143
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Port 443
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Port 3306
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Port 3389
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Port 5432
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Port 6379
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Port 8080
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Port 27017
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Educational Security Context
In TCP/IP and UDP networking, a port is an endpoint to a logical connection and the way a client program specifies a specific server program on a computer in a network. Port numbers range from 0 to 65535.
- Well-Known Ports (0-1023): Reserved for system processes (e.g., HTTP on 80, HTTPS on 443).
- Registered Ports (1024-49151): Assigned by IANA for specific services (e.g., MySQL on 3306).
- Dynamic/Private Ports (49152-65535): Used for ephemeral client connections.
Exposing unnecessary ports to the public internet drastically increases a network's attack surface. We recommend adopting a default-deny firewall posture and implementing Zero Trust architecture for administrative services.