How to Block Ports on a D-Link
By Ruri Ranbe
Every D-Link router includes a firewall that restricts what traffic can enter or exit the network. The firewall helps protect devices on the network from the numerous threats that spread via the Internet. Although the firewall already limits which ports computers are allowed to use for sending and receiving data, you can lock down the router even further to prevent a one or more users from accessing applications -- like instant messaging or peer-to-peer software -- that operate on specific ports.
Open a browser, type "192.168.0.1" (without quotes) into the address bar and then press "Enter."
Select "Admin" from the User Name drop-down menu and leave the Password field blank. Click "Log In" to sign in to the D-Link router.
Select "Advanced" from the menu bar and then click "Access Control" from the left pane.
Check "Enable Access Control" and then click the "Add Policy" button. Click "Next."
Create a name for the policy and then click "Next." Leave "Always" as the default setting and then click "Next."
Enter into the applicable field the IP address of the computer to block. If you don't know the IP address of the computer, select the name of the computer from the Computer Name drop-down menu.
Click "OK." Follow the same instructions to add more computers to the policy, if applicable, and then click "Next."
Check "Apply Advanced Port Filters" and then click "Next." Select "Enable" and then enter the name of the service to block into the Name field.
Select the appropriate protocol -- "TCP," "UDP" or "ICMP" -- from the Protocol drop-down menu.
Enter into the "Dest Port Start" and the "Dest Port End" fields the range of ports to block. To block a single port, enter the number in both fields.
Click "Save" to create the policy. Click "Save Settings" to block the port on the D-Link router.
Ruri Ranbe has been working as a writer since 2008. She received an A.A. in English literature from Valencia College and is completing a B.S. in computer science at the University of Central Florida. Ranbe also has more than six years of professional information-technology experience, specializing in computer architecture, operating systems, networking, server administration, virtualization and Web design.