Some Internet Service Providers block SQL's default port 1433. Alternatively, connections are also allowed through Port 11433.
configure an alternate port on your local machine, open up the "SQL
Client Network Utility". Under the "General" tab, there is a listing of
the Enabled Protocols. Select "TCP/IP" and click on the "Properties..."
button. Here, you'll see 1433 listed as the "Default port". Change this
to 11433 and click the "OK" button. Click on "Apply" button in the main
window, then "OK" to close the Client Network Utility. You can then
connect to your remote SQL database using the alternate port.
can block port 1433 to protect their networks against abuse, virus
attacks, etc. By providing customers with an alternate method of
connecting to their databases, customers the opportunity to use the
tools and services then need for the highest level of management of all
aspects of their sites.