In order to prevent hackers from attacking user equipment or networks through MAC addresses, the MAC addresses of untrusted users can be configured as blackhole MAC addresses to filter out illegal…

In order to prevent hackers from attacking user equipment or networks through MAC addresses, the MAC addresses of untrusted users can be configured as blackhole MAC addresses to filter out illegal MAC addresses. When the device receives a packet whose destination MAC or source MAC address is a blackhole MAC address, it will be discarded directly.