I used Binwalk to extract firmware files, extracted content include 2 folders and one binary file.
squashfs-root _351C.extracted 351C
Squashfs-root contains file system, '_351C.extracted' folder contains security certificates (.crt). Don't know what is '351C' binary file (2.96 Mb).
Now I need to rebuild firmware back to binary image (.bin). How to rebuild this into binary firmware image? I tried use Firmware Mod Kit to extract fw, but it old, fails to run on my LTS 16.04 due missing some dependencies.
The FW file.