FAQ: How to set up NTP time synchronization on an AXIS M5014 | Axis Communications
How to configure Getting Time from NTP Server on TP-Link Smart & Managed Switch?
A.11.1 PRIMERGY
Johannes Weber 🎸 on Twitter: "Hey @pulsesecure, you are not supporting #IPv6-only NTP servers. Is there any reason for that? As your overall IPv6 coverage is quite good, I am bit surprised