Windows 10 Restricting Network Access on Win10/Linux Dual Boot

[banskabanska]

Hello, I have a PC with Windows 10 and Kubuntu Linux dual boot.
The machine is connected to my DSL router via LAN cable. No Wifi hardware installed.

I like Windows to have no internet connection at all. Linux should be able to connect without any restrictions.
How can I prevent Windows from going online while LAN cable is connected?
This must be 100% reliable disconnected so that no application and not even windows can connect secretly

Thanks for helping

 

[Neemobeer]

Nothing will be 100% short of unplugging the cable.

Some options would be

• Remove the NIC driver in Windows
• Disable the NIC in device manager
• Add a firewall rule to block all outbound connections
• Set a static IP address that won't work on your network with no gateway specified

 

[banskabanska]

Thanks for the infos.

Another thought:
What if I connect a wifi stick instead of LAN cable and set a MAC filter in my router to block the stick's real address.
Then in Linux, on boot I let it spoof the MAC to be a permitted one in the router

Would you think this could be more safe since out of Windows' reach?

 

[Neemobeer]

mac filtering is not security and it's fairly easy to bypass.

 

[banskabanska]

mac filtering is not security and it's fairly easy to bypass.

Yes, I know.
But do you really think, Windows OS will scan for wifi traffic by itself and hack itself into the router?

 

[Neemobeer]

No, it would require a person to do that.