Furry - thanks for response.
My main router is an Actiontec GT784WNV provided by Verizon for my DSL link, Firmware Version: GT784WN-VZ-1.1.18. I'm in NYC.
So, when using the DAP-1522 for AP, one does NOT normally do MAC Address Filtering on it? That's a bit surprising, since there's a screen and a page in the manual for MAC Address Filtering under AP.
To understand your advice, do you mean that if a wireless device connects to the DAP-1522, its throughput will still be MAC Address Filtered in my main router and shut out if it's not a listed device? I don't know anything about this stuff, and so you may be right on, but it doesn't feel right. Let's say five WiFi devices are connecting to the DAP-1522. If there's no MAC Address Filtering by the DAP-1522, then there is some small risk that a stranger can also join and access those five devices (although maybe not the main router or anything connected to it). Obviously, WPA2-Personal-AES should stop this, but then why have MAC Address Filtering ever?
Thanks.