I followed the official tutorial at https://www.raspberrypi.org/documentati ... et-sharing to setup my R-Pi 3 as an access point using Raspbian. The plan was to replace my router with the Pi as we move/switch houses. My router sits behind a DOCSIS 3 cable modem.
What I have found is that, once configured, everything worked fine and stations are able to connect to the Pi access point and get Internet access provided the Pi sits behind my router (whose DHCP servers gives 192.168.x.x addresses). If I remove the router and plug the Pi directly into the modem, this does not work anymore (the modem also has a DHCP server).
I think the issue is that when I connect directly to the modem, I (and the Pi does as well) get an address that is publically routable (e.g. 70.x.x.x), not on the 192.168.x.x network. Since the tutorial uses a bridge configuration, I figured this is because the bridged networks here do not share the same mask (i.e. 192.168.x.x and 70.x.x.x in my case).
Does my analysis holds? If so, do you think a pull request to add that to the master page would be relevant?