Hi Stefano, > (a) only "pattern /clid/%c/data"
I suspect the problem that you're seeing here is that if this is your only acl, then other clients won't be able to see that topic. This means your mosquitto_sub instance won't receive the messages, even though it is subscribed to #. You could try something like this instead (how you do it depends on what you're trying to achieve of course) topic read # pattern write /clid/%c/data Or you could add a user line to only allow read access to a specific user. If you can't do what you want, you can write a plugin to do it - https://github.com/jpmens/mosquitto-auth-plug is a great example. Cheers, Roger -- Mailing list: https://launchpad.net/~mosquitto-users Post to : mosquitto-users@lists.launchpad.net Unsubscribe : https://launchpad.net/~mosquitto-users More help : https://help.launchpad.net/ListHelp