Network Time Protocol

Resources

Network Time Protocol

The Network Time Protocol (NTP) is used to synchronize the system time with other devices over the network. This happens in a client-server model.

Implementations

Following implementations of the Network Time Protocol are currently available:

• ntp
• openntpd
• chrony
• net-misc/ntpsec
• net-misc/sntpd
• net-misc/clockspeed

External resources

• RFC 5905 - Network Time Protocol Version 4: Protocol and Algorithms Specification
• RFC 5907 - Definitions of Managed Objects for Network Time Protocol Version 4 (NTPv4)
• RFC 5908 - Network Time Protocol (NTP) Server Option for DHCPv6
• RFC 7164 - RTP and Leap Seconds
• RFC 7822 - Network Time Protocol Version 4 (NTPv4) Extension Fields
• RFC 8573 - Message Authentication Code for the Network Time Protocol
• RFC 9109 - Network Time Protocol Version 4: Port Randomization