How to organize a corporate network with the same subnets in offices?

Question

VPN

There was a need to combine 10 offices into a single network.
The main task is to be able to connect to any of the computers via VNC.
A VPN will be configured between the gateways in the offices and the central office.
The problem is that all offices now have the same local subnet 192.168.0.0/24.
Is there any way to configure routing without changing local subnets?
For example, to give a computer 2 addresses - 1 related to the local subnet, and the second to receive from the DHCP server in the central office?

Answer 1

humanly it won't work. you will have to plant all offices behind nat - and forward ports to VNC.
as a result, you will have to go through vnc such as ip_office1:9991 - vnc of the first PC of office 1, ip_office1:9992 - vnc of the second PC of office 1, etc. If you need access to some other service within the office network from the main network, forward again ports and toil with the indication of the port of the service.
it is better to strain 1 time - and change IP. 100% you have DHCP there and a little bit of static from printers/servers.

Answer 2

You are tired of destroying.
I'll explain with an example.
there is a network 192.168.0.0/24 in office 1 and there is the same network office2
computer from office 1 knows that its local network is 192.168.0.0/24
To access 192.168.0.2 it will make an arp request on its local network, via switches.
And it will not send requests to the router.
And office 2 will be unavailable for him.
How it is possible to solve your problem
The option is that you have 1 provider everywhere and he will make a common VLAN for you.
Then your networks will be on the same subnet.

Answer 3

Hello.
All you need is to have one VPN server and connect offices as clients (IPsec Site-Site for example). Further it is simple to configure routes on the same server. Now any employee can access any network, while having only one IP, for example 192.168.2.54 -> router 1 -> VPN server tunnel -> router 2 -> 10.0.0.76. Checked, we have already raised this for our customers. The VPN server is an intermediary (hub).