Communicate over network
Go to System and Security in the Control Panel. Select Windows Defender Firewall from the drop-down menu. Alternatively, open File Explorer and copy and paste the following into the address bar. In the new window that appears, press Enter and select Windows Defender Firewall.
In the new window, in the left column, click the ‘Allow an app or feature through the Windows firewall’ option.
Click the ‘Change Settings’ button on the next window. To change the firewall settings, you’ll need admin rights. The control options under ‘Allows apps and features’ will be editable once you click the ‘Change settings’ button.
To allow the app to communicate over public and private networks, go through the list and check the box under ‘Private’ or ‘Public.’ You can also uncheck the box if you don’t want the app to communicate over the network.
If you don’t see an app you want to give network access to on the list, scroll to the bottom and click the ‘Allow another app’ button. Then choose the app you want to give network access to.
A word of caution
You should not allow an app to communicate with other computers over the network unless you have a compelling reason. When you run or install an app that requires this in order to function, it will ask for permission. Even so, the app should come from a reputable developer and be downloaded from a reputable source. In general, you should download VLC player from the official website rather than a software repository or a link to someone’s cloud drive.
On that note, it’s a good idea to periodically review this list to see which apps are permitted to communicate over the network. Consider revoking network access to apps you don’t use very often or that you don’t recall installing (and maybe uninstalling them too).