To Open a Range of Ports on an AT&T Security Suite, you have to Open the Start menu on your PC computer and go to the "All Programs" list. After that, click on the "AT&T Security Suite" icon. Then, Go to the "Firewall" tab at the top of the window. Next, click on the "Internet Access Rules" icon. Forth, click on the green check marks next to the port numbers that you want to open on the firewall. Last, Press the "OK" button twice to save the settings and open the specified range of ports.