To configure the Filtering settings for Firewall Plus, click on Settings in the left navigation menu and click on the Filtering tab.

• Enable Firewall: You can activate or deactivate Firewall Plus from here. You may also do this from the main status screen.

• Application filtering Enabled: Application filtering is used to define which applications are to be allowed or blocked. Having this enabled will allow you to set filtering rules for applications. See Applications Filtering.

• Enable enhanced security verification : When this is enabled, you may select between Normal and Quiet modes explained below.

• Normal Mode/Quiet Modes:

When Firewall Plus detects an activity that could be used by a malicious application, it will do the following:

• Check if the application is on a known whitelist of applications.
• Check if the application has a pre-defined set of rules and act accordingly.
• If the application is unrecognized with no set of pre-defined rules, Firewall Plus will prompt you for an action.

The Normal and Quiet modes are pertinent to these prompts:

• Normal Mode : In Normal Mode, you will be prompted  for an action for all applications
• Quiet Mode : In Quiet Mode, you will be prompted for all applications except those residing within the Windows directory.

• Packet Filtering Enabled : Having this enabled allows you to configure Packet filtering which is used to allow or block specific network communications. See Advanced Rules.

• Enable Stealth Mode : When enabled,  your system will appear invisible to other computers in the network. When in Stealth Mode, your computer is able to make connections to other computers in the network, but Firewall Plus will prevent other computers from connecting with yours.

• Enable Stateful Packet Inspection (SPI) : Having this enabled will ensure that unless the connection has been validated (protocol handshake is successful), no unauthorized packets are received by your computer.