بهتره فایر وال رو off نکنی و پورت مخصوص رو باز کنید
To open a port in the Windows firewall for TCP access
In Control Panel, open Network Connections, right-click the active connection, and then click Properties.
Click the Advanced tab, and then click Windows Firewall Settings.
In the Windows Firewall dialog box, click the Exceptions tab, and then click Add Port.
In the Add a Port dialog box, in the Name text box, type SQL Server <instance name>.
In the Port number text box, type the port number of the instance of the Database Engine, such as 1433 for the default instance.
Verify that TCP is selected, and then click OK.
To open the port to expose the SQL Server Browser service, click Add Port, type SQL Server Browser in the Name text box, type 1434 in the Port Number text box, select UDP, and then click OK.
البته بهتره از همین پورت های نام برده استفاده کنی و فایر وال رو off نکنی