In certain scenarios, particularly during Radius integration, the SRX device may prematurely label the authentication as failed due to a prolonged process exceeding the 15-second threshold. This anomaly is manifested in the JSC client as "Configuration Download - Authentication Failed," even though the authentication may eventually succeed.

SRX devices may exhibit instances where the configured time for waiting for a Radius server reply is not adhered to, leading to unexpected authentication failures.

Please refer to the following documentation:

• Radius responses that take longer than 15 seconds can cause SRX to declare authentication failure