> I mean on the backup host without any dependencies so I can use standard file tools and browsers.

This means the backups are not encrypted though, and is something you really have to think twice before requiring

> "pull" (backup remote files)

You can mount the server to backup on the backup host, or you can ssh from the backup host to the server to backup, call `tar cf - /folder`, and ingest that from stdin on the backup host. Both will retransmit the totality of the files to backup