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Free public beta until December 4, 2026: every course is open, no card needed. After that, the first chapter of each course stays free and full access is a one-time $39 ($19 for up to 100 founding members chosen for helpful feedback). Your progress is kept. How the beta works

authentication

Proving who you are -- a device showing the broker a username and password or a certificate.

Authentication is the step in which a party proves its claimed identity to another, by a shared secret, a signed challenge or a certificate chain; it says nothing yet about what that party may do.

Examples

  • Bench node gh-a1 sends its username and password in CONNECT; if mosquitto_passwd never registered that pair, the broker refuses it in CONNACK and no session starts.

See also

authorization access control list client ID broker
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