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Computers I run as a server I always set a static IP address (DHCP Static Mappings for this interface).

This computer has always been using 192.168.2.110.

Yesterday i replaced the motherboard with a complete different brand and model, but when i looked in the "Services: ISC DHCPv4: Leases" i could see the old motherboard as a lease type static at 192.168.2.110 and the new motherboard as lease type dynamic at 192.168.2.110.
The static was offline (red) and the dynamic was online (green).

They both have different MAC addresses and i could connect to the new motherboard on 192.168.2.110.

I then edit the "DHCP Static Mappings for this interface" and changed the MAC address and the dynamic lease type changed to static and the dynamic was gone.

How is it possible that a computer with a complete different MAC address can get an IP address that is set to static?

I'm trying to get OPNsense_C (OpenVPN Client) to connect to OPNsense_S (OpenVPN Server) and make OPNsense_C use OPNsense_S to connect to the internet.

I have manage to connect them both with OpenVPN and the OPNsense_C can ping computers on the OPNsense_S , but whatever i do, it can't get OPNsense_C to connect to the internet through OPNsense_S.

It is a bit confusing if i should add rules on Floating, LAN, OpenVPN, S2S_VPN (the vpn interface) or the WAN.

I have tried to find some kind of help/guide, but i haven't manage to find any. :(

I know ASUS routers have an option for it (Client will use VPN to access: Internet and local network), so assume it is possible to get this to work on OPNsense too?

I haven't tried the new "Instances" in OPNsense, because it is giving me a headache. I don't see how this should make it easier to create OpenVPN servers and clients. It is way more confusing than the old way.

I did tried "Instances", but i gave up after a couple of hours.

I know it is hard to guide someone else's network, but some kind of guidance would be really appreciated.

First i need a rule on the Client to get the computers to use the VPN connection and i think i have manage to get that to work. :)

The problem is on the Server side, how do i get the computers connect to internet on the Server side?

All kind of help is appreciated, big or small.

Maybe you have manage to find some instructions or can point me in the right direction?

I'm not giving up that easy, but now I'm stuck here and need some help.