How to block a domain in OpenVPN config file?

Question

openvpn

Hello everyone, I block the windowsupdate.com domain, disable all possible services, add a file to the host, all in vain, all the same, traffic from this domain breaks through the VPN, even against the wall. How to block this domain at the openvpn level? IP is dynamic, help is needed
Windows 10

Answer 1

VPN has nothing to do with domains, you need to block the IP range

Answer 2

Set up a separate DNS server on which this domain will resolve to something suitable for you (or not resolve at all) - and push it from the vpn server when connected. But in general - it looks like a crutch, IMHO.