@jolly-london-20127 with Traefik, I successfully use port 443 for mosquitto client certificate authentication. so now I can close port 8883 This turned out to be pretty simple setup 😅 https://medium.com/@panda1100/a-solution-to-use-port-443-for-client-certificate-authentication-of-netmaker-v0-14-0-455777589b12