What is Whonix OS?
Whonix is a free and open-source operating system focused on privacy and security. It is designed to run inside a virtual machine and route all internet traffic through the Tor network, which helps to protect the user’s identity and online activities from surveillance and tracking. Whonix is based on the Debian operating system and includes a variety of privacy and security features, such as pre-configured firewalls, privacy-enhanced web browsers, and encrypted communication tools. It is intended to be used as a standalone operating system or as an additional layer of security on top of an existing operating system.
https://www.whonix.org/wiki/VirtualBox/XFCE
How to configure Whonix with Kali
First Install and configure Kali OS on the virtual Box, then go the settings of kali virtual box and select Network and make the changes as mentioned below;
Note: The Internal network Whonix will automatically appear when the Whonix OVA file is imported to virtual box
Now that the kali is tunneled to whonix we need to configure the network setting of kali OS before that we need to identify the whonix OS IP address and Network mask, Fire up the whonix OS and
Now we have the IP and gateway for kali,
we have selected the eth1 because, it is assigned for the internal Network.