remote backup advise

[Steff]

Hi guys,
I'm familiar with CWP and have been running the pro version for many years on Centos 7. At the moment I backup using the backup facilities in the web panel. I then ftp those backups to my workstation.
But now I need to do some housework and automate and secure backups. I say now, as before I used CWP for hobbies, but now I host some business websites.

I wanted to set up something like OpenMediaVault on a remote server and back up to that.
So I'm asking for suggestions based on peoples experiences.
I have my CWP at location "A" and that has a dedcated static ip. I say dedicated because the only server running on that ip address is CWP. I have a server at location "B" and that has a static ip, But I have already one server running on that ip so I have Nginx setup to reverse proxy. The backup server I want to build will probably be virtualise to get the best of the hardware, perhaps running dockers or something.

What would you suggest, or use to do this?