Windows Defender Firewall blocks incoming connections that you haven’t allowed. If you install software that others need to reach, such as a website or a database, you need to add a rule for it. This guide shows you how.
Never turn the firewall off, and never remove the Remote Desktop rule. If you lock yourself out, click Console on the server panel in the Client Area to reach your server from your browser.
Add a rule
Open the firewall settings
Start a new inbound rule
Click Inbound Rules on the left, then New Rule on the right.
Choose Port
Choose Port and click Next.
Enter the port
Choose TCP (unless your software says UDP), and enter the port number under Specific local ports, for example 443. Click Next.
Allow the connection
Choose Allow the connection and click Next.
Choose when it applies
Leave Domain, Private and Public ticked, and click Next. On a VPS, your network connection is usually treated as public.
Name it
Give the rule a clear name, such as Website HTTPS, and click Finish.
Common ports
Only open a database port (such as 1433) to the IP addresses that need it. In the rule’s Properties, open the Scope tab and add those addresses under Remote IP address.
Use PowerShell instead
Open PowerShell as administrator and run, for example:
To remove that rule later:
Firewall tab in the Client Area
You can also attach a firewall from the Firewall tab on your server panel. It filters traffic before it reaches your server. If you use it as well, a connection must be allowed in both places.
Still stuck? Open a ticket with your server’s IP address and the port you’re trying to open. 
