Some of BitDefender's computer security software, such as BitDefender Total Security and BitDefender Internet Security, include firewall components. A software firewall is designed to shield your computer from unwanted access attempts over the Internet by preventing information that you do not request from getting to the computer. However, a firewall can also prevent your computer from receiving information that you do want it to receive. If this is the case, open the associated port in BitDefender's firewall to configure it.
Double-click the BitDefender icon in the system tray to open the BitDefender Dashboard.
Click the "Options" button at the top of the window and select "Expert View."
Click the "Firewall" tab on the left side.
Click the "Programs" tab at the top.
Click the "Add Rule" button.
Click the "Apply rule to all programs" radio button at the top of the window.
Click the "Allow" radio button under "Permission" near the bottom.
Click the "Advanced" tab.
Type the port number that you want to open in the "Port(s)" fields under "Local Address" and "Remote Address."