connecting a Win 11 computer to a Linux computer

[Bill Stanley]

HI,

I have a Windows 11 computer that I use mostly for gaming and 
occasionally for other Windows apps which do not need an internet 
connection.  I just do not trust Microsoft so I have disconnected the 
LAN line to the router and all my internet stuff is through the Linux 
computer.

How can I connect the Windows computer to my Linux computer.  At the 
moment, there is an "air gap" to the windows 11 computer.  Can I 
reconfigure my router so that the windows machine can't access the 
internet but can do 2 way connections only with the Linux computer via 
the router.  By the way, the router is owned by my ISP as part of their 
services.

Best wishes,

Bill Stanley