Method 1: Allow Applications Through Windows Defender Firewall

Windows Defender Firewall may block applications from accessing the local network. To permit an app through the firewall:

 1.   Open Windows Security:

   -  Click on the Start menu.

   -  Type Windows Security and press Enter.

 2.   Navigate to Firewall & Network Protection:

   -  In the Windows Security window, select Firewall & network protection.

 3.   Access Allowed Apps:

   -  Scroll down and click on Allow an app through firewall.

 4.   Modify Settings:

   -  Click on the Change settings button.

   -  If prompted by User Account Control (UAC), click Yes to grant permissions.

 5.   Locate and Enable the Application:

   -  In the list of applications, find the app you want to allow.

   -  Check the box next to the application's name.

   -  Ensure the appropriate network types (Private and/or Public) are selected.

 6.   Add Missing Applications:

   -  If the app isn't listed:

     -  Click on Allow another app....

     -  Use the Browse button to locate the application's executable file.

     -  Click Add, then ensure it's selected in the list

 7.   Save Changes:

   -  Click OK to apply the settings.

Method 2: Configure Network Discovery and File Sharing Settings

To ensure your applications can communicate over the local network, enable Network Discovery and File Sharing:

 1.   Open Settings:

   -  Press Win + I to open the Settings app.

 2.   Navigate to Network & Internet:

   -  Click on Network & Internet in the left-hand menu.

 3.   Access Advanced Network Settings:

   -  Scroll down and select Advanced network settings.

 4.   Change Advanced Sharing Settings:

   -  Under More settings, click on Advanced sharing settings.

 5.   Enable Network Discovery and File Sharing:

   -  Expand the Private network profile.

   -  Toggle on Network discovery and check Turn on automatic setup of network connected devices.

   -  Toggle on File and printer sharing

 6.   Save Changes:

   -  Click Save changes to apply the settings.

Conclusion

By following these methods, your applications should now be able to:

• Discover other devices on the local network.
• Communicate without being blocked by Windows Defender Firewall.
• Operate with the necessary permissions for local network access.

For more detailed information, you can refer to the official Microsoft documentation.