KARTRACER wrote The unit doesn't allow the WAN to be set on the same subnet as the LAN, which I have been able to do with other routers. No idea what you mean with "allow WAN to be set to same subnet...

Of course it also works with a static route instead of a default route. Not that much difference! :) But having to use IP addresses for NTP is definitely a bug - I reported this for the EAP models...

Just to be sure: did you set the router's clock on the Touch P5 (menu Time Settings)?

You need to set a default gateway if you use a static IP for the router. Without a default gateway the router's NTP daemon cannot find or connect to servers. Wether ntpdate on your Debian Linux box...

Did you set the gateway IP in IP settings if using static IP?

Sure. Disable its DHCP server on LAN, connect WAN into one of the four LAN ports and you have an AP.