- Please make sure devices and CMS-installed computer are under the same LAN.
- Make sure that IP address of CMS and Site ID have been filled in on Device webpage
- Make sure that CMS has been selected on “Register To”setting
- Check the firewall configuration of CMS-installed computer
If turning off the computer's firewall is allowed, turn it off and then click Sync on CMS again.
If turning off the firewall is not allowed, add the following ports to the inbound rules in Windows Defender Firewall with Advanced Security: 18183, 11883.
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