Private network between netcup VPS servers?

What you're looking for is the Cloud vLAN product, does exactly what you're looking for in the same location.

https://www.netcup.com/en/server/kvm-server-extensions

And if it is not in the same location oder you need safe connections to other destinations (e.g. your computer): https://tailscale.com/

My recommendation: block SSH in the Netcup firewall, only access your server via SSH over Tailscale.

And if you need more take a look at Netbird

Zitat von TBT

only access your server via SSH over Tailscale

after update

Zitat von Win98SE4ever

after update

Nicht mit Tailscale SSH, sondern mit ganz normalem SSH über Tailscale. Ist ein Unterschied.