What is MAC Filtering?

What does MAC filtering do?

Hardware Filtering or MAC Filtering is a characteristic present on many of the Wireless Router that allows anyone to filter out gadgets & simply the filtered devices shall connect to the network.

This is another security point by which one may define a list of gadgets & only allow those gadgets to connect to the Wi-Fi network.

Any gadget that knows the passphrase & the SSID of the network may smoothly connect with the router when the MAC Filtering is disabled by typing in the correct details & access the net via the network.

Is MAC address filtering worth it?

As the MAC Filtering is enabled, it provides an additional security layer & protects from any unknown gadget, even with the correct details from connecting with the network.

The gadget’s MAC address is checked against the MAC addresses appropriately filtered, even when the gadget requires to join the network with the right info. 

When the gadget’s MAC address matches one on the list, the device can connect with the network. Else, it is blocked from connecting even with the correct details.

By signing in into the router’s admin panel, MAC Filtering may be set up on a router & then configuring the gadgets’ list that is to be asked to connect with the network.

The physical address or MAC address of every gadget should be known & only then, one may enter into the router. Enable the MAC address filtering & one is all set to work when all of the above steps are performed.

The gadget’s MAC address can’t be altered as it is encoded in the hardware. Hence one can’t change that. Therefore, it adds a layer of security by giving the filtered gadget to join the network.

Many computer users don’t know how to locate the approved list of router’s MAC addresses or spoof the MAC address until someone is a professional in spoofing of network & address.

How to configure Wireless MAC address filter on the wireless router?

How do I set up MAC filtering?

Below are the points which can be easily followed:

  1. Click on the favorite browser you usually rely upon. Now, write IP address or http://tplinkwifi.net in the search tab (default is http://192.168.1.1 or http://192.168.0.1). After that, snap Enter. Remember that both the user id and passkey are “admin.”
  1. Get to the IP & MAC Binding, followed by the ARP List page. Here, one may locate the MAC address of all the gadgets which are joined to the router.
  1. Get to the Wireless, followed by Wireless MAC Filtering page; here, touch on the Add New button.
  1. Write in the MAC address one wants to deny or allow to authorize the router. Now, give a few details about this thing. The status must be Enabled &, finally, touch on the Save button. Step by step, one requires to add items in this way.
  1. Finally, kindly select Allow/Deny & Enable the Wireless MAC Filtering function about the Filtering Rules.

Configure for MAC Address Filtering

It asks one to restrict traffic getting from particular known gadgets or machines. 

The router utilizes the MAC address of a PC or gadget on the network to get it and permit or block the authorization. Traffic getting in from a particular MAC address shall be filtered, rely upon the policy.

For enabling MAC address filtering:

  • Select Firewall > Advanced Settings MAC Filtering.
  • When one touches on the box saying Enable, one gets MAC Address Filtering for this gadget. To disable this feature, don’t select the box.
  • For the gadget to enable MAC Address Filtering, one may go with any choice given below: 
    • First Allow then Block the Rest—To authorize the traffic from the MAC addresses (particular), one may select this option. On the router’s LAN side, here, one may block traffic from other machines or gadgets.
    • First Block then Allow the Rest—To block the traffic from the MAC addresses (particular), one may select this option. From other addresses, here, one may allow traffic.

The filtering policy of MAC doesn’t override a firewall rule that allows incoming traffic to a host.

  • In the MAC Addresses table, one may choose Add.
  • Enter the MAC address & details to get into the table & snap Save. Try again for each address to block or allow.
  • Don’t forget to Save.

Wired vs. Wireless Networks: Security is given via MAC filtering

  1. n wireless networks, the signals travel via the medium of air. Anyone may hear them & get the source MAC address. Hence, it is quite simple for an attacker to locate the white-listed MAC addresses & mimic them.

Let us take an example: 

A group of friends chatting with each other, & they only chat with people around them. When one of them says anything, he usually says his name at first. So, as Jack says, “Hello, I’m Jack. Today I’m this and that, etc. etc.”. 

If one is supposed to pass near them, one may listen to one of their names & utilize it at the beginning of the sentence. Here, they would think that this is Jack. (Kindly don’t consider their ability to look at you and get the voice)

  1. The signals travel via the wires from the hosts to the switch, switch-wired networks, or wired networks. Here, it is much arduous for hackers to listen to them to get the source MAC address.

Let us consider an instance: 

The same condition in the earlier instance, but rather talking, the friends send one another straight post-it notes, directly. As an outsider, one has no idea what they are up to & their names are, so, different that neither has any idea nor any relation with it.

Can MAC filtering be hacked?

To summarize, what makes an ineffective MAC filtering is a hacker who gets an actual MAC address. By getting a valid MAC address, the hacker can become someone else & “convince” the server/router/AP that one is the white-listed device.

It is known as simple to attain and get an actual MAC address in the wireless network than it is in wired networks. That’s why MAC filtering is quite effective in wired networks than in wireless networks.

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