Public image is open for changing running STB software. Public image is intended for debugging, operative changes of internal settings, monitoring and other auxiliary purposes. Public image can be updated in STB manually by user at STB booting stage ( from Bootloader menu - for STB MAG-250/254/270 or System Recovery Utility menu for STB MAG-256 and MAG-322/324/349/351). Public versions of the software are signed with the public key (ID_KEY = STB_PUBLIC), included in Operator Utilities to make STB SW image. At the same time, manufacturer provides with Release the necessary software components, on base which users can create your own publick image modification (in order to customize image) according to instructions of manufacturer. Public image is created by manufacturer and is issued in Release of every STB model.In factory image, access to STB root file system on SSH protocol is forbidden. This mechanism allows to use only proven (factory made) STB software. Factory image contains mechanism that prevents updating to other (non-factory) images.
Factory image is distributed for STB updating - last version of Factory image ( imageupdate file) is provided to users from manufacturer's web-server. Factory image is created by factory and installed in STB at factory in manufacturing process.The following two basic variants of STB software are applied: STB software is issued and provided by manufacturer in public access.
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