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Loading Firmware on the Device

The Junos OS 21.2 R1 S1 22.2R1 images only accept the firmware signed with ECDSA and rejects any firmware signed with RSA+SHA1. You cannot downgrade to images that are signed with RSA+SHA1 from "ECDSA signed only” images. In this scenario, the SRX Series Firewall does not load the firmware.

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