How to drive VM traffic (Proxmox) through VPN tunnel?

Question

VPN

There is server A and server B.
On server A, Proxmox and 5 virtual machines are raised.
On server B, a VPN tunnel with 5 ipv4 ips is raised.
How to configure virtual machines so that all incoming and outgoing traffic goes through server B?
I would like to receive links in the answers where this has already been discussed, because I don’t even know how to drive a request into Google.

Answer 1

on b raise an openvpn server
on virtual machines raise openvpn clients and connect to the server b.