This is the same with other versions of OpenSprinkler:
https://openthings.freshdesk.com/solution/articles/5000569763-video-how-to-set-up-port-forwarding-for-remote-access
We do plan to introduce cloud support for at last OS 3.0 (and likely OS 2.3 as well), in a similar way to OpenGarage and OpenSprinkler Bee (both use Blynk’s cloud support).