I want to configure a VPN via IPSec for Mac and iOS. I need to set a manual DNS-server with a local adress of the destination network.
On Mac this is easy. Just setup a new VPN, then click Advanced at there you go. You can enter the DNS-server and search domains if necessary. I tested it and it worked perfectly.
On iOS this seems impossible. There is no such option in the VPN settings (iOS 14). I also tried to use Configurator 2 (Version 2.7.1 is the latest I can use with my old MacBook) for creating a profile. However, there are just the same options as in the VPN settings on the device itself.
I want to use the VPN via the mobile network and for mobile networks aren't any DNS options either.
How can I set up the DNS-Server?