Section: Threats and Vulnerabilities
Explanation/Reference:
Explanation:
MAC filtering is typically used in wireless networks. In computer networking, MAC Filtering (or GUI filtering,
or layer 2 address filtering) refers to a security access control method whereby the 48-bit address assigned
to each network card is used to determine access to the network.
MAC addresses are uniquely assigned to each card, so using MAC filtering on a network permits and
denies network access to specific devices through the use of blacklists and whitelists. While the restriction
of network access through the use of lists is straightforward, an individual person is not identified by a MAC
address, rather a device only, so an authorized person will need to have a whitelist entry for each device
that he or she would use to access the network.
While giving a wireless network some additional protection, MAC filtering can be circumvented by scanning
a valid MAC (via airodumping) and then spoofing one's own MAC into a validated one.