time setting

When I first setup my 5231 cam 2 years ago, I think I just used "Sync PC". I think this changed and it was off by 20 years! What settings do you use? Do you favor a certain name server? Thanks, R

When I receive notifications top right of my NVR I get told "Line crossing ect" when I click play it will show me a preview but starts like 1+ mins before the actual line crossing is there any way to change this so it shows me 5 seconds before and 5 seconds after? Hello, quick question with my...

I am sure this topic has been discussed a few times here, but would like to know what most think the best practise is for syncing Dahua IP cameras' time with a Dahua NVR/XVR's time? Should the NVR/XVR be set to sync with an NTP and each IP camera also set to sync with an NTP in the camera's own...