VIVOTEK
Network: This rule allows the user to assign a network address and corresponding subnet mask to the Allow/Deny List.
For example:
IP address 192.168.2.x will be blocked.
Range: This rule allows the user to assign a range of IP addresses to the Allow/Deny List.
Note: This rule is only applied to IPv4. For example:
Administrator IP address
Always allow the IP address to access this device: You can check this item and add the Administrator’s IP address in this field to make sure the Administrator can always connect to the device.
User's Manual - 51