Thanks, fisherman. I am not seeing any sort of mDNS configuration in my router (Linksys EA6300). I do have Static Route configuration. Not sure if that will get me where I need to be.
For now, I just threw out the subnet and changed it over to a bridge connection for now so we are all on the same subnet. Very uncomfortable with this practice! 😀
May need to look into some sort of cloud-based offering where the devices register so I can tackle them regardless of their network connection.