I'm editing my post here. I have a Sophos CS110-24 switch I noticed that no devices on my LAN could contact any NTP server to synchronize their time. I found out that it was the DoS prevention setting. When enabled, no devices can synchronize…

First off, I want to say Thank you to Sophos technical support for excellent work! (Bryan L.) This is why we are using Windows for DHCP rather than another solution: In order for Windows DNS to update, for DHCP clients, the windows DHCP server must…