This article explains why Mist automatically zeroizes the SRX device when it is released from the Mist portal.

To re-onboard an SRX device to Mist, it is essential to ensure that the device is properly reset and cleared of any previous configurations. In Junos OS, the request system zeroize command is used to erase all configuration data and reset all cryptographic keys on the device. This process is critical to ensure a clean state for successful re-onboarding.

After zeroizing, the SRX device can be configured according to Mist’s onboarding requirements. This step is especially important if the device was previously used or configured in a different environment.