Hi @tjiang, this error means the RADIUS shared secret is incorrect. To resolve this, please verify that the shared secret is correctly entered in both radius_secret_1 (or 2-n) field in the config file and on your appliance. If you have encrypted this password, we recommend testing with a plain text password to verify everything works, then encrypting it later. If you are using an encrypted secret or password, be sure to use the “protected” version of the parameter in the config file.