Trusted Zone to allow mapped netwok drive


I’ve set up a ‘trusted zone’ so that my mapped network drives on the local machine can be accessed from another PC. I had manually failed to configure a ‘network control rule’ to allow access to the mapped network drives from the other PC. With the trusted zone added, my mapped network drives are working perfectly.

The rule that the ‘trusted zone’ creation made allows any IP with any protocol in the range to My router is on IP - connected to the router is my cable modem. I want to check that my new trusted zone has not inadvertedly allowed anyone connecting to my router via the cable modem to access my local network and mapped drives?

Thanks all.