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Software update is an important part of maintaining high security in your network. Updates are released on regular basis with no strict schedule to allow fast updates when possible threats arise. Updates are complete system images that are downloaded by the "recovery firmware" directly to the (normally read-only) system disk (CF, USB, etc) from our update servers (account for an estimate download size of 100MB). The advantage of "complete system image" updates (that overwrites the entire system disk) is that every appliance is known to be exactly identical.
* Be prepared to access the video/[[serial console]] in case of failure
Standard (cached) update == If your system disk (CompactFlash, USB stick or virtual disk) is at least 1 GB, or you ' ve attached a [[ architecture#File_system|storage]] (USB or virtual) disk, it's possible to pre-download the system image before booting into the recovery OS. This is the recommended update method, especially for setups that use eg. [[ PPPoE]] or other connection methods which are not available in the recovery OS.
Streaming update == If you're unable to use the normal (cached ) update method, you can perform a ''streaming '' update . The system will reboot to the "recovery firmware" partition, erase the system partition (leaving the configuration partition intact), downloading and writing the image to the system partition while verifying its SHA256 checksum, and finally rebooting back to the newly created system partition when done, resuming normal operations.
* On boot, by pressing "f" (generally any key) when prompted, and then in the recovery OS console type "update" and follow the instructions
* From the [[CLI]] using the syntax: