uutommi wrote Here is the beta firmware: US version : http://static.tp-link.com/C1200 V1(US).zip Other location: http://static.tp-link.com/C1200 V1(EU).zip Thank you, installing this solved my issue.

I am also having the same problem as described. It seems that the router always accepts wired connections that are whitelisted when the whitelist is activated, but rejects all wireless connections.