How to integrate a network from KVM servers into a local one?

Question

VPN

Good evening.
Please tell me how to organize such a scheme:
1. There is a local network 192.168.0.xxx
2. It is for mikrotik with a white IP.
3. There is a dedicated server with a white IP, on CentOS7 on which 3 KVM virtual machines are connected to the network 192.168.100.xxx.
How can these networks be combined so that each other's resources are visible?
Thanks in advance.

Answer 1

The easiest way is the GRE tunnel, as I understand correctly, ip mikrotik and ip CentOS are in different local networks, right?
if yes, then you need a tunnel between mikrotik and CentOS.
It looks like this client ping 192.168.0.10 -> 192.168.100.10, default gateway suppose 192.168.0.1 receives the packet and sees that the packet is addressed to the subnet 192.168.100.0/24, which means send traffic to the tunnel virtual interface, and then this virtual interface makes a real package with some shenanigans.