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 on Allowing apps to communicate through Windows Defender Firewall.