[Q] What is a MAC address filtering?

There is no security effect on MAC address filtering

However, if you intercept Wi-Fi radio waves, you can easily check the MAC address of other terminals.In addition, the MAC address used for communication can be easily changed using tools and OS functions.

For this reason, even if the MAC address filtering is performed, if the radio wave is intercepted, the MAC address is obtained, and the MAC address is communicated, the MAC address filtering will be easily slipped.

When Wi-Fi began to spread, this MAC address filtering was sometimes introduced as one of the security functions.However, because it can be easily avoided as described above, it is not expected to be effective as a security measure.

Therefore, basically, we do not use MAC addresses, but properly implement security measures other than MAC address filtering, such as properly setting and using the Wi-Fi security standard WPA (Wi-Fi Protected Access). let's do it.

スマホをWi-Fiに接続する方法は？　Wi-Fiがつながらない原因と解消法は？　Wi-Fiルーターの選び方は？　この連載では、これからWi-Fiを導入する人や、Wi-Fiを導入しているがトラブルを抱えている人に向けて「Wi-Fiの基本」や「トラブル解消のテクニック」をQ&A形式で解説していきます。