Vivotek ND9542P 32-Channel 4K UHD NVR (No HDD) - Manual (Page 167)

VIVOTEK - Built with Reliability
User's Manual - 167
To authorize access to NVR
from VAST
Enter the OpenVPN DNS domain name and the credentials on the NVR network service
configuration page.
A public IP or domain name must be configured on the VAST server for the access through the
Internet. The IP or domain name can contain alpha-numeric characters [0-9][a-z][A-Z][-]. Hyphen
[-] can not be the beginning or the ending character.
Note that the NVR and VAST server should have a similar time setting when exchanging
certificate information. Otherwise, the mutual handshake authentication process may fail.