Well, I landed here because I was trying to figure out how to set up mac filtering (allow) because my kids' devices keep changing their MAC. This makes parental controls worthless (and I am paying for it). Sad to see it is not an option. I must admit I switched from NetGear and ASUS because TP-Link products are solid; that is, I never have any issues with wifi. They just plain work. However, the lack of this feature rendering parental controls ineffective forces me to look at other products that do support MAC whiltelisting (cringe).

The Deco X53-DSL does not appear to support MAC address whitelisting.

I find that unacceptable.

The blacklisting mode is useless, as I do not know the MAC addresses of potential attackers.

 Seriously, after 4 years. Still no white list..shame on you. Im switching to other brands.

  @KubanDude please consider a white list because is very important feature for safety!