The version of mosquitto currently in ubuntu doesn't have TLS support full stop.
There is an open bug about getting a more recent version of mosquitto into ubuntu: https://bugs.launchpad.net/ubuntu/+source/mosquitto/+bug/1358019 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1375131 Title: TLS support missing To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mosquitto/+bug/1375131/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs