Quazzie / tellstick-plugin-mqtt-hass timeout on broker

I have two sites connected with site2site-VPN. Both is managed by 1x HomeAssistant in primary home.
Mosquitto-broker and Home Assistant is installed on a 2x dedicated VMs.
tellstick-plugin-mqtt-hass works perfect from secondary/remote home. From primary home the tellstick times out every time it tries to connect to the MQTT-broker. I have tried with two different brokers but still same result.

Seems like quazzie is not able to help;
Anyone who could help?