So, this is extremely disappointing that I cannot access the device using its IP address. I just replaced my old WaterPoint system with a Rachio3 and reading this is a bad surprise. When the company making my previous controller, OnPoint, went under, their server was shut down but all I lost was authentication. I connected their unit to a fixed address on my router, and I configured it to map an external port to the unit’s http port and I could access the device: my-DynDNS-address:port-number. I am a Linux/Unix geek and I normally stay away from anything that is not open. I hope it was not a mistake to get a Rachio. I am definitely keeping my old OnPoint system, just in case…