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I'm setting up off-site backup, how?
(sopuli.xyz)
A place to share alternatives to popular online services that can be self-hosted without giving up privacy or locking you into a service you don't control.
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You can connect your main server and backup server to a VPS with wireguard. The main server backs up proxmox vms and cts to a proxmox backup server on the backup server. Nextcloud data can be backed up with something like duplicati encrypted over sftp to the backup server. Only hiccup about backing up Nextcloud is you should put it into maintenance mode first. You can write a script pre duplicati backup and post backup to enable and disable maintenance mode.
VPS is worth considering. I run no vms.
Duplicati seems like a good option.
Aware of maintenance mode. Thanks!