How can I configure Windows Firewall?, Open a Port on Windows firewall?. Firewall systems in networks and servers help prevent unauthorized access to given computer resources. The firewall systems checks for the incoming or even the outgoing traffic and then makes decisions about them based on the rules configured.
In our previous guide, we saw how to cause MS SQL server to listen on a specific port. In case the port is not explicitly allowed in the Windows Firewall, then the port won’t still be reached. In this guide, we shall go over the steps on how to expose the port by allowing it from the Firewall.
“Don’t grieve. Anything you lose comes round in another form.”
Step 1: Open Windows Firewall
Hit the Windows key and search for “firewall with Advanced Security“. Choose the first option that comes as shown below. Once the firewall window opens, proceed to the second step.
Step 2: Configure Inbound rule.
Click on the “Inbound Rule” button on the top left section and choose “New Rule” on the top right section of the window. See below for a better visual view. A “New Inbound Rule Wizard” window will open. Proceed to the next step.
Step 3: On the Wizard
On the new window, follow the steps shown in the screenshots below
Choose port and hit next.
Choose TCP, input the port to be allowed and hit next.
Allow the connection and hit next
Depending on what you desire, you can either choose “Domain, Private or Public“. Hit Next after that.
Place a name for the rule, a description if you like and hit Finish
The port is now open. You can telnet to confirm if it is listening.