Sorry, guess I am use to 192.168.x.x internal networks. I have not had a Comcast modem in over a decade, running a SB6190 now, my second modem purchase. Comcast charges $10 a month where I am at, so this $75 modem pays for itself in less than a year. Also, no more Comcast Hotspots owning your own modem (but looks like you can now turn that off, there was a time you could not).Thanks guys. I’ll try the UPNP suggestion.
I have the comcast router/firewall box (wifi is off) with 10.0.0.x network / DHCP so all the devices on the LAN are 10.0.0.x. Then I have the Apple airport thats functioning as wifi. Finally i have the netgear wifi extender to partition the doorbell to have its own network id/secret.
The same exact setup works in another house, so perhaps something’s off with this comcast box
Will follow the UPNP advice and report back.
Yeah let us know your outcome with the Plug N Plug, it will help others. I would just be sure and turn off UPnP after your Doorbell is registered like Emiks5 stated.