this post was submitted on 02 Nov 2023
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If your backups are visible from the targeted systems, you are doing it wrong. Done right, a backup utility at most only uses an agent on the systems to be able to contact them to get the data and the backups are not reachable.
Have a look at how BackupPC works, not even an agent, it accesses network shares to get the data:
https://backuppc.github.io/backuppc/
I'll check out backupPC. What is the most common/best practices way to make sure the backup medium isn't accessible from any endpoints on the network?
Unplug it after the backup.