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[sql-server] Default SQL Server Port

I have a VB6 application that uses SQL server. It needs to access it through a LAN. Therefore I want to make an exception in firewall.

What is the default port of microsoft SQL server ?

(I am using Microsoft SQL Server 2005)

This question is related to sql-server database networking port

The answer is

The default port for SQL Server Database Engine is 1433.

And as a best practice it should always be changed after the installation. 1433 is widely known which makes it vulnerable to attacks.

The default port 1433 is used when there is only one SQL Server named instance running on the computer.

When multiple SQL Server named instances are running, they run by default under a dynamic port (49152–65535). In this scenario, an application will connect to the SQL Server Browser service port (UDP 1434) to get the dynamic port and then connect to the dynamic port directly.

https://docs.microsoft.com/en-us/sql/sql-server/install/configure-the-windows-firewall-to-allow-sql-server-access

For Http Request Default Port number is 80

For Https Default Port Number is 443

For Sql Server Default Port Number is 1433

Source: Stackoverflow.com

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