Cannot link to VPN in macOS X VM running through Sierra

I'm running an old version of 4D v12.0 which is not compatible with OS updates following Yosemite.
Unfortunately my new system is now Sierra as standard and I am trialling Parallels to run a El Capitan OS to get around the problem.

El Capitan is running smoothly as a VM and I have 4D installed, but to access the database I need to use a VPN connection.
I cannot seem to be able to get this to setup and connecting through the VM and I would really appreciate any help/advice.

 

Hi,
usually, while VM is in Shared Networking mode, it sees the VPNd network.
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If you need to setup VPN connection inside VM, then usually it should work also while Shared Networking. But you can try to switch to Bridged networking