13
Daytime
Low RiskTCP/UDP — System & Infrastructure
Port Overview
Port Number
13
Service Name
Daytime
Transport Protocol
TCP/UDP
Category
System & Infrastructure
Security Risk
Low
Port Range
Well-Known (0-1023)
What is Port 13?
Daytime protocol. Returns the current date and time as a human-readable string. Largely replaced by NTP for accurate time synchronization.
TCP/UDP
System & Infrastructure
Commonly Used
Security Considerations
Port 13 (Daytime) 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.