I'm not so sure here. This patent only applies to Wi-Fi connections onto the Amazon owned network. So the client device must first broadcast their SSID (public), request access to a private network, then request data through the Amazon router (Inspected/Firewalled by default). It's Amazon's prerogative to block ports or IPs at their discretion as every router or VPN does.
2) anti-competitive behavior
It's definitely anti-competitive in spirit if they reduce information access to competitors - whether it's legally anti-competitive is probably a gray area and my guess is that the patent filers have already taken that into account.