Multiple name servers

EuroEager

On my desktop which is joined to my windows domain and using dns server on that DC (an all is working good) I have installed an openVPN client.
I don't know much about the installation because the manager of the company that I vpn connect to has done most of the setup.
When I connect to vpn I can reach resources on that network without any problems, but not my own anymore.
I can see on ipconfig that the TAP adapter for vpn does not provide any default gateway address (and e.g. tracert shows that all non-vpn traffic is using my own gateway.
dns server addresses are also setup (one real address and another 8.8.8.8 which I have no idea what is).
My "own" NIC has also dns server addresses setup, but, as mentioned above, they seem to be not used when connected to vpn.
After disconnect everything locally is working fine again.

I guess that the fact that non-vpn traffic is using my own gateway shows that this is split-tunneling and I thought name resolution should then use whichever dns server referred to from NIC by matching dns suffix or similar.

Really I don't care how this is working, but I would like to run split tunneling and being able to resolve addresses on both the "vpn dns server" and my own on DC, anyone knows how to do this?

TinCanTech

EuroEager wrote I don't know much about the installation because the manager of the company that I vpn connect to has done most of the setup.
When I connect to vpn I can reach resources on that network without any problems, but not my own anymore.

This is the person you need to contact.

EuroEager wrote I would like to run split tunneling and being able to resolve addresses on both the "vpn dns server" and my own on DC

By default, this is what Windows does and most people call this a DNS Leak

Openvpn implemented --block-outside-dns to resolve this problem.

EuroEager

So you mean this should be/ought to be, a "vpn side" administration?
Please tell me what is meant by dns leak!
(could it be that I would be able to "put" something on the "vpn network" which possibly would not be possible otherwise (some filetering on the gateway side?).

Anyway, it is currently setup as split tunneling in the sense of using my own gateway, what could possibly make security worse by allowing me to use my own dns for resolving my own domain resources?