By default, Mosquitto broker allows anonymous connections. Mosquitto broker can be configured to require username and password when client connects to the broker. This tutorial shows how to setup username and password authentication for Mosquitto broker on Raspberry Pi.
We can create the password file using mosquitto_passwd tool. File path is provided as first argument and username is provided as second argument. The -c option means that new password file will be created. Execute the following command and enter a password for the user:
sudo mosquitto_passwd -c /etc/mosquitto/credentials myuserNow we need to modify Mosquitto configuration file.
sudo nano /etc/mosquitto/mosquitto.confAdd the following lines at the end of mosquitto.conf file:
allow_anonymous false
password_file /etc/mosquitto/credentialsIf we made changes to the configuration file, we need to restart the Mosquitto broker.
sudo service mosquitto restartNow we need to provide the username and password in order to connect to Mosquitto broker.
The 2 Comments Found
Dear Sir, I need a clarification if possible: I have already entered in Mosquitto the password, what I can not understand is how to enter a new password (to replace the previous one). Basically, the first time I installed Mosquitto on the Raspberry, after editing the configuration file
mosquitto.confadding among the other strings these:allow_anonymous falsepassword_file /etc/mosquitto/passwords
I created the password with these commands:
cd /etc/mosquittosudo mosquitto_passwd -c passwords mqtt_user
(instead of mqtt_user I put one of my personal user) and then in terminal I see a request to enter a password, now I do not know if to enter a new password, I have to repeat the commands above:
cd /etc/mosquittosudo mosquitto_passwd -c passwords mqtt_user
or do another procedure. Thanks a lot for your help
Good night
Tom
The
-coption creates a new password file or overwrites it if already exists. If you want to change user password, you should executemosquitto_passwdcommand without-coption. Command will prompt you to provide a new password two times. When you finished, don't forget to restart Mosquitto service.sudo mosquitto_passwd /etc/mosquitto/passwords mqtt_usersudo service mosquitto restart
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