Cannot. If some one reset it, the router will go back to factory defaults and previous configuration will be lost.

Hi Carneth, did you make it? I'm not sure if the router can do what you want. Sounds quite complicated...Did you contact TP-LINK support team? http://ticket.tp-link.com/index.php?/Tickets/Submit

Umm, maybe but not clearly enough as screenshots... Anyone else know your Wi-Fi password? If you reboot the router, can you login with admin? Next time, after reset it, during configuration, change...

The latest firmware fixed the problem?

27Mbps rate is not normal. http://www.tp-link.com/en/faq-409.html Have you reset them and repair them? Did you test the download speed bypassing powerline adapters?

A similar post here and I think the answer will make you disappointed. http://forum.tp-link.com/showthread.php?2238-Looking-for-the-AT-command-line&highlight=command