This is a structured list of my blogposts covering the network time protocol (NTP). It consists of the basic parts building, authenticating, and monitoring NTP servers. If you want to operate NTP in a secure manner, have a look!

Building Stratum 1 NTP Servers

• Why should I run own NTP Servers?
• Packet Capture: Network Time Protocol (NTP)
• NTP Server via DCF77 on a Raspberry Pi
• NTP Server via GPS on a Raspberry Pi
• Updating NTP Servers
• NTP Appliance: Meinberg LANTIME & SyncFire