udp - NTP Request Packet - Stack Overflow
myOMRON Europe - myKnowledge
Fast Troubleshooting for Windows Time Service (w32time) Synchronization
Network Time Protocol - Wikipedia
NTP / Network Time Guide For Video Surveillance
InfoSec Handlers Diary Blog - SANS Internet Storm Center
Yealink Support
System Time - EWS User Manual
emNet NTP Client
Network Time Security: new NTP authentication mechanism | APNIC Blog
How Does Network Time Protocol Work | Zindagi Technologies
Preventing NTP Reflection Attacks | Acunetix
VMware Front Experience: How to use ESXi 5 as an NTP server - OR - How to permanently add custom firewall rules?
Network Time Security: new NTP authentication mechanism | APNIC Blog
Knowledge: Configuring NTP
Network Time Protocol - an overview | ScienceDirect Topics
How to Port Forward NTP - PureVPN Blog
Network Time Protocol - an overview | ScienceDirect Topics
ICP DAS WISE
Part 2: Is your home network unwittingly contributing to NTP DDOS attacks? - SANS Internet Storm Center
Why do Windows NTP queries use port 123 for both source and destination?
Can a Dedicated NTP Time Server Improve Network Security?
Task 8: Synchronizing System Time with an NTP Server
Enable or Disable the Network Time Protocol (NTP) Using CentreWare Internet Services (CWIS)
