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AUTH [username] password

Time complexity: O(1)

ACL categories: @fast, @connection

The AUTH command authenticates the current connection. If the username is omitted, it implies the user default from ACL. Dragonfly will deny any command executed by the already connected clients, unless the connection gets authenticated via AUTH.

If the password provided via AUTH matches the configured password, the server replies with the OK status code and starts accepting commands. Otherwise, an error is returned and the clients needs to try a new password.

Note that requirepass also changes the ACL default user password.

Security notice

Because of the high performance nature of Dragonfly, it is possible to try a lot of passwords in parallel in very short time, so make sure to generate a strong and very long password so that this attack is infeasible.


Simple string reply or an error if the password is invalid.