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Your router's MAC address filter is security theater, and here's what actually protects your Wi-Fi

MAC address filtering sounds like home network security, but it’s easy to bypass and mostly creates more hassle for you.
Ars Technica

MAC address filtering question

I have a linksys BEFSR41. I've never used MAC address filtering before, but I'd like to use an extra added feature for the 802.11b stuff below the Linksys router. Anyway, I have this setup option, but ...