Copyright (c) Fire4 Systems Inc, 2019. All rights reserved
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Dashboard: ARP Table
Address Resolution Protocol (ARP) is a protocol for mapping an Internet Protocol address (IP
address) to a physical machine address (Media Access Control - MAC address) that is recognized
in the local network. For example, in IP Version 4, the most common level of IP in use today, an
address is 32 bits long. In an Ethernet local area network, however, MAC addresses for attached
devices are 48 bits long. A table, called the ARP cache, is used to maintain a correlation between
each MAC address and its corresponding IP address. ARP provides the protocol rules for making
this correlation and providing address conversion in both directions.
The ARP table can be displayed by clicking on Dashboard, ARP table. This is shown in the figure
below.
Devices on both the LAN side and WAN side of the Authonet firewall are listed. The MAC address
is a permanent identification for the device, whereas the IP address is issued by the Authonet
firewall for a limited period of time (lease time). The IP address allocated to the device can
subsequently change.