Ubuntu. How to make a gateway from Ubuntu with Cisco Anyconnect on board?

Question

linux

Good afternoon.

There is an Ubuntu virtual machine (let it be 192.168.199.20) with a Cisco Anyconnect vpn client connected on board.
Vpn is needed to work with another network, specifically with an external network, and even more specifically with ip, for example 192.168.120.8.

There is a client machine (let it be 192.168.199.10). I want to register a route on it so that it goes to 192.168.120.8 through the gateway 192.168.199.20 with cisco anyconnect on board.

How to turn an Ubuntu VM into a gateway in this case?
This is the first time I've encountered this, I would like to hear more experienced people in this matter.
thanks in advance