[tehmaco]

The gateway is needed to route outside of the local subnet, so if the bulb is 192.168.1.17, it can talk to anything in 192.168.1.0/24 (presuming a standard home user setup), but anything else would get 'no route to host' errors on initial connection attempts.

You'd need to configure the DHCP to hand out these kinds of leases by MAC address though, as I can't see vendors agreeing on a way to easily restrict the devices net access! :-/

[lowgman]

Perhaps your average router needs a button to 'add device', only allowing new devices access via something like the WPS button with a term second window for new DHCP request incoming? Otherwise the DHCP ignores any incoming request, just sleeps. Adds one step in the quickstart guide.