CPU going to 100% overnight

Below is my settings for the NTP and one of my cameras. Make sure your cameras are pointed to the BI machine's NIC address for the camera NIC.

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I have a BI system that has two NICS 192.168.1.235 192.168.2.235

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okay thanks guys, it's working now,I was pointing the camera to the time server instead of the IP address of the PC..
 
okay now that I have this working I want to turn my Windows firewall back on and just allow the cameras through to get the time.
So I turned on Windows firewall and allowed nettime.exe and nettimeservice.exe,but that doesn't seem to be working, is there something else I should be allowing through?
 
Put the IP of your time server, BI server, in the cameras setting. Make sure that port 123 is open through Windows.