Or much more simply -- verify the update integrity. e.g. Kindles use a signed update package, and if the update_*.bin has a webpage for content, it won't be signed...
AIUI, Kobo updates are just gzipped tarballs -- so at least check for a gzip header (and check for .tgz corruption)
before assuming it is a valid update and rebooting.
That would catch firewalls as well as a few other problems.
Quote:
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Error: Corrupted update files.
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