I use MQTT (Mosquitto) and several ESP8266 for sensoring issues.
I want that the clients also can "subsribe" to trigger actions on the clients.
The MQTT Server is placed in a VLAN of my main router. Beside this VLAN another router (let's call it ESP Router) is connected to the main router (all intralan).
The WiFi clients from the ESP router cann connect to the MQTT server via 1883.
But if I want to subscribe topics on the WiFi clients I need port forwarding on the ESP Router. I just can port forward a specific port to a specific port/address. How can I portforward to this complete WiFi subnet? I am using Mikrotik routers.