ARP issues a list of feedback.
By default, wan and lan port of the arp state is enabled
ARP list, which this time will be displayed outside the network within the network and ARP information
Convenient management and traffic.
If you wan the arp status of disabled, then the list would not exist outside the ARP network ARP address its purpose.
But the question arises, thus leading to the internal network can not access the external network IP address, and the external network in a completely off-grid.