123
NTP
Low RiskUDP — System & Infrastructure
Port Overview
Port Number
123
Service Name
NTP
Transport Protocol
UDP
Category
System & Infrastructure
Security Risk
Low
Port Range
Well-Known (0-1023)
What is Port 123?
Network Time Protocol. Synchronizes clocks across networked computers with millisecond accuracy. Essential for logging, security certificates, and distributed systems.
UDP
System & Infrastructure
Commonly Used
Security Considerations
Port 123 (NTP) is classified as low risk. This service uses encryption or has a minimal attack surface, making it relatively safe to expose.
Recommendation: Standard security practices apply. Keep software updated and monitor access.