@kdurigan This actually worked! I I forwarded the TCP port 443 from the gateway to the controller at the main site, and then was able to update the gateway at the remote site. The port is definitely...

@MacMorgan no, I didn't. I got a different router without wifi and use the X20s as access points only. They seem to work okay that way.

I tried upgrading to that firmware, but they all failed even when I tried using the IP address of each one to do the upgrade.

I'm having the same problem. The main unit becomes completely unresponsive. The other units turn red but the main on stays green (or it stays off if it stopped reposnding at night when the LEDS turn...