![background image](http://html1.mh-extra.com/html/larson-electronics/nvr-ndaa-poe-4ch/nvr-ndaa-poe-4ch_instruction-manual_3722672127.webp)
127
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.
1.
Click
System > Security > ARP Protection.
2.
Select the desired NIC and then select
Enable ARP
Protection
.
3.
Obtain the gateway's MAC address automatically, or select
Custom
and input the MAC address.
4.
Click
Apply
to save the settings.
802.1x
802.1x is a port-based network access control protocol mainly
used to solve authentication and security issues on LAN.
Only certain NVR models support this function. Note that
changing the NIC working mode will disable 802.1x automatically.
1.
Click
System > Security > 802.1x.
2.
Select the desired NIC and select the check box to enable
802.1x.
3.
Select the EAPOL version, and then enter the username and
password of the authentication server.