Howdy,
I’m going to apologize in advance if this is a simple question, but my google-fu is not getting me results.
I have a 3D printer. This printer allows me to connect it to my local network so my PC can send it files. I can see it attempting to communicate out to the internet via my PIhole however. How can I block it from attempting to reach out but still allow it to connect to my PC?
Depending on your router, you should be able to simply block all outbound connections for the IP address the printer is assigned. Usually under firewall settings somewhere.