What is an Access Control List (ACL)? An access control list is a list, stored on a network router, the devices allowed on a network. The list determines which devices can connect to the network and what devices are not allowed. Using this list, a wifi administrator (or home user) can block unauthorized access to your network.
Access Control Lists are configured by a wireless router. A network hub device does not work. A network hub allows all traffic to pass in both directions; it does not filter all traffic. A traffic router filters, you can block traffic in both directions or re-route traffic. A router may be a basic router (eg. NetGear, Linksys) from any electronics store, an advanced router (Cisco Router for example) or a configured server / workstation as a router. A router stores information in the ACL and on the basis of that information, directs traffic in and out of a network.
This screen shows the list control of a NETGEAR router access. This list has a device listed. If the access list is activated, only this device could access the wireless network. You can build an ACL on a router and has chosen not to implement filtering of access, but if you spent the time to create the list, you might as well use it. There are now devices, which can access a WiFi network a few years ago. Such devices are Smart Phones, Gaming Systems, laptops, tablets, etc.
The most routers are pre-configured to broadcast their SSID (the name of the Wi-Fi network) and allow traffic to connect . The majority of Internet users are now familiar with protecting their WiFi networks with the addition of a password for access to the network. This allows you to protect your network, but it is possible that some hackers could find the network password. Adding an Access Control List will help to further reduce unauthorized access with the addition of a second layer of defense. An access list stores the MAC address of the device. If the computer attempting to access the network is not listed in this list, you will not be allowed to access the network. There are some hackers who are able to hi-jack a valid MAC address, so there are no systems 100% guaranteed, but some security is better than none. An additional security measure could be added (after the implementation of ACL), it would be to disable the SSID broadcast. This will cause some problems with some WiFi devices that automatically combines the wi-fi network, but well worth the safety.
manual review of the specific router for proper way to configure your specific router. we will discuss in a future broadcast SSID post, subscribe to the blog for alerts about upcoming post.
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