{"id":409,"date":"2026-05-22T16:22:55","date_gmt":"2026-05-22T14:22:55","guid":{"rendered":"https:\/\/eryann.fr\/?p=409"},"modified":"2026-05-22T16:22:56","modified_gmt":"2026-05-22T14:22:56","slug":"fiche-mosquitto-mqtt","status":"publish","type":"post","link":"https:\/\/eryann.fr\/index.php\/mqtt\/fiche-mosquitto-mqtt\/","title":{"rendered":"Fiche mosquitto mqtt"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">1. Introduction<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">MQTT (Message Queuing Telemetry Transport) est un protocole l\u00e9ger de messagerie tr\u00e8s utilis\u00e9 dans les projets IoT, les syst\u00e8mes embarqu\u00e9s et les infrastructures de supervision. Dans un BTS CIEL ou SIO, tu rencontres souvent MQTT dans des projets de capteurs, de domotique, de supervision industrielle ou d\u2019\u00e9changes machine \u00e0 machine.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Mosquitto est l\u2019un des brokers MQTT les plus populaires sous Linux. Il fonctionne tr\u00e8s bien sur Debian et Ubuntu, consomme peu de ressources et s\u2019int\u00e8gre facilement avec Node-RED, Home Assistant, Grafana ou des scripts Python.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Dans cette fiche, tu vas apprendre \u00e0 :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Installer Mosquitto sur Debian ou Ubuntu<\/li>\n\n\n\n<li>Comprendre le fonctionnement de MQTT<\/li>\n\n\n\n<li>Configurer un broker MQTT<\/li>\n\n\n\n<li>Utiliser les commandes principales<\/li>\n\n\n\n<li>S\u00e9curiser les \u00e9changes avec TLS<\/li>\n\n\n\n<li>G\u00e9rer les utilisateurs et les ACL<\/li>\n\n\n\n<li>Configurer le pare-feu<\/li>\n\n\n\n<li>Lire les logs et d\u00e9panner une installation<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Cette fiche respecte les contraintes p\u00e9dagogiques demand\u00e9es par Breizh Sec Ops.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">2. Sommaire<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Introduction<\/li>\n\n\n\n<li>Sommaire<\/li>\n\n\n\n<li>Pr\u00e9sentation de MQTT et Mosquitto<\/li>\n\n\n\n<li>Installation de Mosquitto<\/li>\n\n\n\n<li>Fonctionnement des topics MQTT<\/li>\n\n\n\n<li>Arborescence et fichiers importants<\/li>\n\n\n\n<li>Synth\u00e8se Markdown pour ta fiche bristol<\/li>\n\n\n\n<li>Configuration compl\u00e8te de Mosquitto<\/li>\n\n\n\n<li>Gestion des utilisateurs et mots de passe<\/li>\n\n\n\n<li>S\u00e9curisation TLS<\/li>\n\n\n\n<li>Pare-feu et ports r\u00e9seau<\/li>\n\n\n\n<li>Commandes essentielles MQTT<\/li>\n\n\n\n<li>Exemples concrets<\/li>\n\n\n\n<li>Logs et d\u00e9pannage<\/li>\n\n\n\n<li>Bonnes pratiques de s\u00e9curit\u00e9<\/li>\n\n\n\n<li>Erreurs fr\u00e9quentes<\/li>\n\n\n\n<li>Pour aller plus loin<\/li>\n\n\n\n<li>Liens utiles et documentation officielle<\/li>\n\n\n\n<li>Propositions de TP<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">3. Pr\u00e9sentation de MQTT et Mosquitto<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">MQTT repose sur un mod\u00e8le Publisher \/ Subscriber.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Les \u00e9quipements ne communiquent pas directement entre eux. Ils passent par un broker MQTT.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Exemple :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Un capteur publie une temp\u00e9rature<\/li>\n\n\n\n<li>Le broker Mosquitto re\u00e7oit le message<\/li>\n\n\n\n<li>Les clients abonn\u00e9s r\u00e9cup\u00e8rent l\u2019information<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Architecture :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Capteur ---&gt; Broker MQTT ---&gt; Client abonn\u00e9<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Les notions importantes :<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u00c9l\u00e9ment<\/th><th>Description<\/th><\/tr><\/thead><tbody><tr><td>Broker<\/td><td>Serveur MQTT<\/td><\/tr><tr><td>Publisher<\/td><td>Client qui envoie<\/td><\/tr><tr><td>Subscriber<\/td><td>Client qui re\u00e7oit<\/td><\/tr><tr><td>Topic<\/td><td>Canal logique<\/td><\/tr><tr><td>QoS<\/td><td>Niveau de garantie<\/td><\/tr><tr><td>Retain<\/td><td>Dernier message conserv\u00e9<\/td><\/tr><tr><td>TLS<\/td><td>Chiffrement des \u00e9changes<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">4. Installation de Mosquitto<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Sous Debian ou Ubuntu :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>sudo apt update<br>sudo apt install mosquitto mosquitto-clients -y<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Explications :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>apt update<\/code> : met \u00e0 jour les index de paquets<\/li>\n\n\n\n<li><code>apt install<\/code> : installe le broker et les clients MQTT<\/li>\n\n\n\n<li><code>mosquitto-clients<\/code> : ajoute <code>mosquitto_pub<\/code> et <code>mosquitto_sub<\/code><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00e9rifie le service :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>sudo systemctl status mosquitto<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">D\u00e9marrer automatiquement :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>sudo systemctl enable mosquitto<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Red\u00e9marrer apr\u00e8s modification :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>sudo systemctl restart mosquitto<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">5. Fonctionnement des topics MQTT<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Un topic repr\u00e9sente un canal logique.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Exemple :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>maison\/salon\/temperature<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Hi\u00e9rarchie :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>maison\/<br>\u251c\u2500\u2500 salon\/<br>\u2502   \u251c\u2500\u2500 temperature<br>\u2502   \u2514\u2500\u2500 humidite<br>\u2514\u2500\u2500 cuisine\/<br>    \u2514\u2500\u2500 temperature<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Wildcards :<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Symbole<\/th><th>R\u00f4le<\/th><\/tr><\/thead><tbody><tr><td><code>+<\/code><\/td><td>Un niveau<\/td><\/tr><tr><td><code>#<\/code><\/td><td>Tous les niveaux<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Exemples :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>maison\/+\/temperature<br>maison\/#<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">6. Arborescence et fichiers importants<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Fichiers principaux<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Fichier<\/th><th>R\u00f4le<\/th><\/tr><\/thead><tbody><tr><td><code>\/etc\/mosquitto\/mosquitto.conf<\/code><\/td><td>Configuration principale<\/td><\/tr><tr><td><code>\/etc\/mosquitto\/conf.d\/<\/code><\/td><td>Configurations suppl\u00e9mentaires<\/td><\/tr><tr><td><code>\/etc\/mosquitto\/passwd<\/code><\/td><td>Base utilisateurs<\/td><\/tr><tr><td><code>\/etc\/mosquitto\/acl<\/code><\/td><td>ACL MQTT<\/td><\/tr><tr><td><code>\/var\/log\/mosquitto\/mosquitto.log<\/code><\/td><td>Logs<\/td><\/tr><tr><td><code>\/etc\/ssl\/certs\/<\/code><\/td><td>Certificats CA<\/td><\/tr><tr><td><code>\/etc\/mosquitto\/certs\/<\/code><\/td><td>Certificats Mosquitto<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Arborescence typique<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>\/etc\/mosquitto\/<br>\u251c\u2500\u2500 mosquitto.conf<br>\u251c\u2500\u2500 conf.d\/<br>\u251c\u2500\u2500 passwd<br>\u251c\u2500\u2500 acl<br>\u2514\u2500\u2500 certs\/<br>    \u251c\u2500\u2500 ca.crt<br>    \u251c\u2500\u2500 server.crt<br>    \u2514\u2500\u2500 server.key<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">7. Synth\u00e8se Markdown pour ta fiche bristol<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code># Mosquitto MQTT<br><br>## Installation<br>sudo apt update<br>sudo apt install mosquitto mosquitto-clients -y<br><br>## Service<br>sudo systemctl status mosquitto<br>sudo systemctl restart mosquitto<br><br>## Publication<br>mosquitto_pub -h localhost -t test\/topic -m \"Bonjour\"<br><br>## Abonnement<br>mosquitto_sub -h localhost -t test\/topic<br><br>## Utilisateur MQTT<br>sudo mosquitto_passwd -c \/etc\/mosquitto\/passwd admin<br><br>## TLS<br>listener 8883<br>cafile \/etc\/mosquitto\/certs\/ca.crt<br>certfile \/etc\/mosquitto\/certs\/server.crt<br>keyfile \/etc\/mosquitto\/certs\/server.key<br><br>## Logs<br>journalctl -u mosquitto<br>tail -f \/var\/log\/mosquitto\/mosquitto.log<br><br>## Pare-feu<br>sudo ufw allow 1883\/tcp<br>sudo ufw allow 8883\/tcp<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">8. Configuration compl\u00e8te de Mosquitto<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Voici un exemple complet de configuration s\u00e9curis\u00e9e.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Fichier :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/etc\/mosquitto\/conf.d\/secure.conf<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Configuration :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>persistence true<br>persistence_location \/var\/lib\/mosquitto\/<br><br>log_dest file \/var\/log\/mosquitto\/mosquitto.log<br>log_type error<br>log_type warning<br>log_type notice<br>log_type information<br><br>allow_anonymous false<br>password_file \/etc\/mosquitto\/passwd<br>acl_file \/etc\/mosquitto\/acl<br><br>listener 1883<br>protocol mqtt<br><br>listener 8883<br>protocol mqtt<br><br>cafile \/etc\/mosquitto\/certs\/ca.crt<br>certfile \/etc\/mosquitto\/certs\/server.crt<br>keyfile \/etc\/mosquitto\/certs\/server.key<br><br>tls_version tlsv1.2<br><br>max_connections 100<br><br>message_size_limit 0<br><br>persistence true<br><br>autosave_interval 1800<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Explications importantes :<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Param\u00e8tre<\/th><th>R\u00f4le<\/th><\/tr><\/thead><tbody><tr><td><code>allow_anonymous false<\/code><\/td><td>interdit l\u2019acc\u00e8s anonyme<\/td><\/tr><tr><td><code>password_file<\/code><\/td><td>active les comptes MQTT<\/td><\/tr><tr><td><code>acl_file<\/code><\/td><td>contr\u00f4le les acc\u00e8s<\/td><\/tr><tr><td><code>listener 1883<\/code><\/td><td>port MQTT classique<\/td><\/tr><tr><td><code>listener 8883<\/code><\/td><td>port MQTT TLS<\/td><\/tr><tr><td><code>cafile<\/code><\/td><td>certificat CA<\/td><\/tr><tr><td><code>tls_version<\/code><\/td><td>impose TLS 1.2<\/td><\/tr><tr><td><code>max_connections<\/code><\/td><td>limite clients<\/td><\/tr><tr><td><code>persistence<\/code><\/td><td>conserve les messages retain<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Tester la configuration :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>mosquitto -c \/etc\/mosquitto\/mosquitto.conf -v<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">9. Gestion des utilisateurs et mots de passe<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Cr\u00e9er un utilisateur :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>sudo mosquitto_passwd -c \/etc\/mosquitto\/passwd admin<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Options :<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Option<\/th><th>R\u00f4le<\/th><\/tr><\/thead><tbody><tr><td><code>-c<\/code><\/td><td>cr\u00e9e le fichier<\/td><\/tr><tr><td>sans <code>-c<\/code><\/td><td>ajoute un utilisateur<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Ajouter un autre utilisateur :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>sudo mosquitto_passwd \/etc\/mosquitto\/passwd capteur1<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">ACL MQTT<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Fichier :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/etc\/mosquitto\/acl<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Exemple :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>user capteur1<br>topic write maison\/capteur1\/#<br><br>user supervision<br>topic read maison\/#<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Ici :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>capteur1<\/code> peut publier<\/li>\n\n\n\n<li><code>supervision<\/code> peut lire<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">10. S\u00e9curisation TLS<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">G\u00e9n\u00e9ration des certificats<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Cr\u00e9er un r\u00e9pertoire :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>sudo mkdir -p \/etc\/mosquitto\/certs<br>cd \/etc\/mosquitto\/certs<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Cr\u00e9er une autorit\u00e9 CA :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>openssl req -new -x509 -days 3650 -extensions v3_ca -keyout ca.key -out ca.crt<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Cr\u00e9er la cl\u00e9 serveur :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>openssl genrsa -out server.key 2048<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Cr\u00e9er la CSR :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>openssl req -out server.csr -key server.key -new<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Signer le certificat :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>openssl x509 -req -in server.csr -CA ca.crt -CAkey ca.key -CAcreateserial -out server.crt -days 365<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">S\u00e9curiser les permissions :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>sudo chown mosquitto:mosquitto \/etc\/mosquitto\/certs\/*<br>sudo chmod 600 \/etc\/mosquitto\/certs\/server.key<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">11. Pare-feu et ports r\u00e9seau<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Ports MQTT<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Port<\/th><th>Usage<\/th><\/tr><\/thead><tbody><tr><td>1883<\/td><td>MQTT non chiffr\u00e9<\/td><\/tr><tr><td>8883<\/td><td>MQTT TLS<\/td><\/tr><tr><td>9001<\/td><td>MQTT WebSocket<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Configuration UFW<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">MQTT local :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>sudo ufw allow from 192.168.1.0\/24 to any port 1883 proto tcp<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">MQTT TLS :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>sudo ufw allow 8883\/tcp<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Refuser acc\u00e8s externe :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>sudo ufw deny 1883\/tcp<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00e9rifier :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>sudo ufw status verbose<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">12. Commandes essentielles MQTT<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Publication simple<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>mosquitto_pub -h localhost -t test\/topic -m \"Bonjour MQTT\"<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Options :<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Option<\/th><th>R\u00f4le<\/th><\/tr><\/thead><tbody><tr><td><code>-h<\/code><\/td><td>h\u00f4te<\/td><\/tr><tr><td><code>-t<\/code><\/td><td>topic<\/td><\/tr><tr><td><code>-m<\/code><\/td><td>message<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Abonnement<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>mosquitto_sub -h localhost -t test\/topic<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">Authentification<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>mosquitto_pub -h localhost -t test\/topic -m \"test\" -u admin -P motdepasse<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">TLS<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>mosquitto_pub \\<br>-h mqtt.example.local \\<br>-p 8883 \\<br>-t test\/topic \\<br>-m \"TLS OK\" \\<br>--cafile ca.crt \\<br>-u admin \\<br>-P motdepasse<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">QoS<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>mosquitto_pub -t test -m \"QoS1\" -q 1<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>QoS<\/th><th>Description<\/th><\/tr><\/thead><tbody><tr><td>0<\/td><td>au plus une fois<\/td><\/tr><tr><td>1<\/td><td>au moins une fois<\/td><\/tr><tr><td>2<\/td><td>exactement une fois<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">13. Exemples concrets<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Capteur de temp\u00e9rature<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Publication :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>mosquitto_pub -t maison\/salon\/temperature -m \"22.4\"<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Lecture :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>mosquitto_sub -t maison\/salon\/temperature<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">Node-RED<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Node-RED peut :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>publier<\/li>\n\n\n\n<li>recevoir des messages MQTT<\/li>\n\n\n\n<li>stocker des donn\u00e9es<\/li>\n\n\n\n<li>d\u00e9clencher des alertes<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Python<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Installation :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>pip install paho-mqtt<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Script simple :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>import paho.mqtt.publish as publish<br><br>publish.single(<br>    \"maison\/test\",<br>    \"Bonjour\",<br>    hostname=\"localhost\"<br>)<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">14. Logs et d\u00e9pannage<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Logs systemd<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>journalctl -u mosquitto<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Temps r\u00e9el :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>journalctl -u mosquitto -f<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">Log Mosquitto<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>tail -f \/var\/log\/mosquitto\/mosquitto.log<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">Ce que tu peux voir dans les logs<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Message<\/th><th>Signification<\/th><\/tr><\/thead><tbody><tr><td>Client connected<\/td><td>connexion client<\/td><\/tr><tr><td>Client disconnected<\/td><td>d\u00e9connexion<\/td><\/tr><tr><td>Invalid password<\/td><td>mauvais mot de passe<\/td><\/tr><tr><td>TLS error<\/td><td>erreur certificat<\/td><\/tr><tr><td>ACL denied<\/td><td>acc\u00e8s refus\u00e9<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">V\u00e9rifier l\u2019\u00e9coute r\u00e9seau<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>sudo ss -tulpn | grep mosquitto<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Alternative :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>sudo netstat -tulpn | grep mosquitto<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">Tester le port<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>nc -zv 127.0.0.1 1883<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">15. Bonnes pratiques de s\u00e9curit\u00e9<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ne laisse jamais MQTT ouvert anonymement sur Internet.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Toujours :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>d\u00e9sactiver <code>allow_anonymous<\/code><\/li>\n\n\n\n<li>utiliser TLS<\/li>\n\n\n\n<li>limiter les ACL<\/li>\n\n\n\n<li>filtrer avec UFW<\/li>\n\n\n\n<li>utiliser des mots de passe robustes<\/li>\n\n\n\n<li>surveiller les logs<\/li>\n\n\n\n<li>limiter les topics accessibles<\/li>\n\n\n\n<li>isoler les objets IoT dans un VLAN<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u00c9vite :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>MQTT sans chiffrement sur WAN<\/li>\n\n\n\n<li>les certificats auto-sign\u00e9s publics<\/li>\n\n\n\n<li>les acc\u00e8s root<\/li>\n\n\n\n<li>les wildcard ACL trop larges<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">16. Erreurs fr\u00e9quentes<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Permission denied sur certificats<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Cause :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>server.key inaccessible<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Solution :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>sudo chown mosquitto:mosquitto \/etc\/mosquitto\/certs\/*<br>sudo chmod 600 server.key<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">Connection Refused<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Causes possibles :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>pare-feu<\/li>\n\n\n\n<li>mauvais mot de passe<\/li>\n\n\n\n<li>listener absent<\/li>\n\n\n\n<li>service arr\u00eat\u00e9<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Adresse d\u00e9j\u00e0 utilis\u00e9e<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Erreur :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Address already in use<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Recherche :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>sudo ss -tulpn | grep 1883<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">17. Pour aller plus loin<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Tu peux ensuite \u00e9tudier :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>MQTT over WebSocket<\/li>\n\n\n\n<li>clustering MQTT<\/li>\n\n\n\n<li>EMQX<\/li>\n\n\n\n<li>HiveMQ<\/li>\n\n\n\n<li>int\u00e9gration Grafana<\/li>\n\n\n\n<li>supervision Prometheus<\/li>\n\n\n\n<li>MQTT avec Docker<\/li>\n\n\n\n<li>haute disponibilit\u00e9 MQTT<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">18. Liens vers : les sites officiels, les mooc ou autres contenus p\u00e9dagogiques qui font r\u00e9f\u00e9rences, etc<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Documentation officielle Mosquitto<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/mosquitto.org\/man\/mosquitto-conf-5.html\">https:\/\/mosquitto.org\/man\/mosquitto-conf-5.html<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">R\u00e9f\u00e9rence officielle compl\u00e8te des param\u00e8tres de configuration Mosquitto.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Documentation Debian Mosquitto<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/wiki.debian.org\/mqtt\">https:\/\/wiki.debian.org\/mqtt<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u00e8s utile pour comprendre l\u2019int\u00e9gration Debian et les services MQTT.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Documentation Ubuntu UFW<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/ubuntu.com\/server\/docs\/security-firewall\">https:\/\/ubuntu.com\/server\/docs\/security-firewall<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Explique la configuration correcte du pare-feu UFW.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">OpenClassrooms \u2014 D\u00e9couvrez les r\u00e9seaux TCP\/IP<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/openclassrooms.com\/fr\/courses\/6391971-administrez-vos-systemes-et-reseaux\">https:\/\/openclassrooms.com\/fr\/courses\/6391971-administrez-vos-systemes-et-reseaux<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Permet de revoir les bases r\u00e9seau indispensables avant MQTT.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">OpenClassrooms \u2014 S\u00e9curisez vos applications<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/openclassrooms.com\/fr\/courses\/4668056-securisez-vos-applications-web-avec-owasp\">https:\/\/openclassrooms.com\/fr\/courses\/4668056-securisez-vos-applications-web-avec-owasp<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u00e8s utile pour comprendre TLS, les certificats et les \u00e9changes s\u00e9curis\u00e9s.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">RFC MQTT<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/docs.oasis-open.org\/mqtt\/mqtt\/v5.0\/mqtt-v5.0.html\">https:\/\/docs.oasis-open.org\/mqtt\/mqtt\/v5.0\/mqtt-v5.0.html<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sp\u00e9cification officielle MQTT v5.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">19. Propositions de TP<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">TP 1 \u2014 Installation MQTT<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Objectif :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>installer Mosquitto<\/li>\n\n\n\n<li>publier et recevoir un message<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Travail demand\u00e9 :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>installer le broker<\/li>\n\n\n\n<li>publier un message<\/li>\n\n\n\n<li>observer les logs<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">TP 2 \u2014 S\u00e9curisation TLS<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Objectif :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>chiffrer les \u00e9changes MQTT<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Travail demand\u00e9 :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>g\u00e9n\u00e9rer une CA<\/li>\n\n\n\n<li>cr\u00e9er un certificat serveur<\/li>\n\n\n\n<li>activer TLS<\/li>\n\n\n\n<li>tester avec <code>mosquitto_pub<\/code><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">TP 3 \u2014 ACL MQTT<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Objectif :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>limiter les acc\u00e8s utilisateurs<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Travail demand\u00e9 :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>cr\u00e9er plusieurs comptes<\/li>\n\n\n\n<li>cr\u00e9er des ACL diff\u00e9rentes<\/li>\n\n\n\n<li>v\u00e9rifier les restrictions<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">TP 4 \u2014 Int\u00e9gration Node-RED<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Objectif :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>superviser des donn\u00e9es MQTT<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Travail demand\u00e9 :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>connecter Node-RED<\/li>\n\n\n\n<li>afficher des temp\u00e9ratures<\/li>\n\n\n\n<li>g\u00e9n\u00e9rer une alerte<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">TP 5 \u2014 Supervision et logs<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Objectif :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>analyser le fonctionnement du broker<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Travail demand\u00e9 :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>provoquer des erreurs d\u2019authentification<\/li>\n\n\n\n<li>analyser les logs<\/li>\n\n\n\n<li>identifier les connexions clientes<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>1. Introduction MQTT (Message Queuing Telemetry Transport) est un protocole l\u00e9ger de messagerie tr\u00e8s utilis\u00e9 dans les projets IoT, les syst\u00e8mes embarqu\u00e9s et les infrastructures de supervision. Dans un BTS CIEL ou SIO, tu rencontres souvent MQTT dans des projets de capteurs, de domotique, de supervision industrielle ou d\u2019\u00e9changes machine \u00e0 machine. Mosquitto est l\u2019un [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[29,34,33,5],"tags":[],"class_list":["post-409","post","type-post","status-publish","format-standard","hentry","category-administration-systeme","category-mosquitto","category-mqtt","category-systeme"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Fiche mosquitto mqtt - Eryann Breizh SecOps<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/eryann.fr\/index.php\/mqtt\/fiche-mosquitto-mqtt\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Fiche mosquitto mqtt - Eryann Breizh SecOps\" \/>\n<meta property=\"og:description\" content=\"1. Introduction MQTT (Message Queuing Telemetry Transport) est un protocole l\u00e9ger de messagerie tr\u00e8s utilis\u00e9 dans les projets IoT, les syst\u00e8mes embarqu\u00e9s et les infrastructures de supervision. Dans un BTS CIEL ou SIO, tu rencontres souvent MQTT dans des projets de capteurs, de domotique, de supervision industrielle ou d\u2019\u00e9changes machine \u00e0 machine. 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