Press the F5 key to access Advanced setup.
Click Network Protection→ Firewall, select Interactive mode from the Filtering mode drop-down menu, and then click OK to save your changes.
Attempt to run the application or connect to the device that was blocked. Your ESET product will prompt you to allow or deny each connection that is not already affected by an existing rule. To create the rules you need to unblock your application or device, select Create rule and remember permanently and click Allow.