Why my NAS cannot access my MacBook running AirVPN ?

[GoetzPhilippinen 2]

I use AirVPN on my MacBook and it works fine. I get Internet over my Huawei Router.

I also use a NAS (QNAP with Qfinder software) that is installed next to my TV and accesses the LAN via a Tenda router.

 

Without AirVPN running I have no problems accessing my NAS from my MacBook.

As soon I run AirVPN on my MacBook all I get is "No network connection" when I try to connect to my NAS.

 

 

In AirVPN I have Network Lock enabled but also checked for "allow LAN/private

The "Adresses allowed" is the IP of my NAS.

But even with those settings its not working.

HOW do I have to configure AirVPN so that I can access my NAS from my MacBook ?