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1. #TYPICAL CISCO MAC ADDRESS HOW TO#
2. #TYPICAL CISCO MAC ADDRESS CODE#
3. #TYPICAL CISCO MAC ADDRESS SERIES#

The MAC address for your device can usually be found in the settings of the network or WI-FI depending on device.

#TYPICAL CISCO MAC ADDRESS HOW TO#

Below I will outline how to build a typical whitelist that allows IPs to connect. By denying the trusted device on the public WIFI, you force it to try to authenticate on the private network. An example would be a workplace, which has both private and public WIFI. This is useful if you want to deny certain devices on one WIFI network, but allow it to connect to another.

When a device tries to connect to the network, the router will compare the incoming MAC address against the whitelist and if there is a matching entry, it will permit that device to connect.Ī reverse whitelist or “blacklist” denies defined MAC addresses onto the network. If you have two smartphones and one laptop that connect to your WIFI network, then the MAC address of each device would be added to the router’s MAC whitelist. The quick synopsis is look at the second character in a MAC address, if it is a 2, 6, A, or E it is a randomized address. There is a bit which gets set in the OUI portion of a MAC address to signify a randomized / locally administered address. A MAC whitelist is an inventory of known MAC addresses that are permitted or denied access to the WIFI network. Fortunately it is easy to identify randomized MAC addresses.

#TYPICAL CISCO MAC ADDRESS CODE#

How does a MAC whitelist work? Every internet-capable device has a unique ID code called a MAC address. How is this different from an IP address? An IP address can be re-assigned to any device while the MAC address is hard-coded to the device. I think while not complete protection a whitelist can be used, as one tool of many, to thwart the “drive-by” intruder. This use is common in most IEEE 802 networking technologies, including Ethernet, Wi-Fi, and Bluetooth. Should they be ignored for providing a false sense of security? Perhaps. A media access control address (MAC address) is a unique identifier assigned to a network interface controller (NIC) for use as a network address in communications within a network segment. Whitelists are not perfect and a determined attacker could bypass them with enough effort. Static MAC addresses offer security to a specific interface.

#TYPICAL CISCO MAC ADDRESS SERIES#

The 200/300 Series Managed Switches allows you to configure a static MAC address. Below you will find a step by step how-to guide on adding a whitelist to a typical consumer router, but first a brief statement:Įasily defeated? – A MAC whitelist is another layer of protection that can be added to your WIFI network in an effort to keep unwanted devices out, it does NOT replace a strong WPA2 password, but compliments it. A Media Access Control address (MAC address) is a unique identifier assigned to network interfaces for communication on the physical network segment.