Kaspersky's Internet Security suite has a function where it blocks traffic from accessing ports on your computer unless those ports have been opened through the software. Once you open a port in Kaspersky, any programs that communicate through that port have unrestricted access to communicate to and from the Internet, so use caution when opening a port, as this can lead to unintended security problems.
Open Kaspersky Internet Security and click on the "Settings" button.
Click the "Settings" button, click "Add," click "Application" and then select the application that you want to use the port that you are going to open.
Click on the "Add" button in the new window that appears and then check the "Local Port" check box.
Click "Enter Port" in the window that appears, type in the port number that you want to open, then click the "OK" button.
Click "OK" twice more to save the settings.