Revo RU8NVR2AX User Manual page 129

NOTE!
If Blocklist is selected, the NVR denies remote access from the IP

address(es) on the list.
If Allowlist is selected, the NVR only allows remote access from the IP

address(es) on the list. However, if Allowlist is selected with no IP address
specified, remote access to the NVR will be denied.
Click Apply to save the settings.
ONVIF Authentication
Enable ONVIF authentication under System > Security > ONVIF Auth so a
username and password will be required for ONVIF-based device access.
Select the check box and then click Apply.
ARP Protection
ARP protocol is used to associate an IP address to a hardware MAC
address. ARP attacks mainly occur on LAN, in which attackers use forged
IP and MAC addresses. APR protection prevents this kind of attacks by
verifying the gateway's MAC address in all access requests.
Note that changing the NIC working mode will disable ARP protection
automatically.
Click System > Security > ARP Protection.
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