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Harden rsync backup against ransomware?


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I've been wondering what measures could be taken to harden against a ransomware attack.

I am using the rrsync script mentioned in this gist.

One idea was to limit the upload to, say 1.2x of the latest snapshot on remote such that it cannot push out old snapshots by sheer backup size and then send a mail to the admin.

submitted by /u/chimp73
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