I have a Verizon-branded Actiontec MI424WR wireless modem/router. Machines connected to the router over WiFi can communicate with each other. Machines connected to the router over Ethernet can communicate with each other. However, machines connected to the router via Ethernet are unable to communicate with machines connected to the router over WiFi.
How can I configure the MI424WR so that machines connected over WiFi and Ethernet can communicate with each other?