SQL Server Default Port

What is the default port for SQL Server?

SQL Server, by default, listens for connections on port 1433. Understanding this port is crucial for establishing connections to the database server. Knowing the default port helps in troubleshooting connection issues.

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Description

Example H2

Example H3

SQL Server, like many other database systems, uses a port number to identify itself on a network. This port number acts as a virtual doorway for communication between applications and the database server. The default port for SQL Server is 1433. This means that when you try to connect to a SQL Server instance, your application needs to know this port number. If you're connecting from a client application, you'll need to specify this port in your connection string. If you're using a tool like SQL Server Management Studio (SSMS), it will typically use the default port automatically, but you can change it if needed. The port number is an important configuration setting, and incorrect configuration can lead to connection failures. It's essential to ensure that the port is open and accessible on the server's firewall, and that the SQL Server service is running.

Why SQL Server Default Port is important

Knowing the default port is essential for connecting to a SQL Server instance. Without this knowledge, you won't be able to establish a connection, and troubleshooting connection issues becomes significantly more difficult. It's a fundamental aspect of database administration and development.

SQL Server Default Port Example Usage


-- Example using SQL Server
-- Find stored procedures containing the string 'calculate'
SELECT name
FROM sys.procedures
WHERE definition LIKE '%calculate%';

-- Example using PostgreSQL
-- Find stored procedures containing the string 'update'
SELECT proname
FROM pg_proc
WHERE prosrc LIKE '%update%';

SQL Server Default Port Syntax

Common Mistakes

Forgetting to specify the port number in the connection string when connecting from a client application.
Incorrectly configuring the firewall to block connections on port 1433.
Assuming the port is always 1433 without checking the server configuration.
Misunderstanding the role of the port in the context of network communication.

Frequently Asked Questions (FAQs)

Why does SQL Server use port 1433 by default, and can I change it?

Port 1433 is the official IANA-registered TCP port for Microsoft SQL Server traffic. Using a well-known default simplifies client configuration, because most tools (including SQL Server Management Studio) assume 1433 automatically. You can, however, change the listening port in SQL Server Configuration Manager—common in multi-instance or security-hardened environments. After changing it, update every client’s connection string and make sure the new port is allowed through the server’s firewall; otherwise, connections will fail even if the SQL Server service is running.

How do I modify my connection string or SSMS settings when SQL Server runs on a non-default port?

Append the custom port number after the server name, separated by a comma (e.g., Server=myhost,51433;Database=Sales;Trusted_Connection=True;). In SQL Server Management Studio, type myhost,51433 into the “Server name” field. Behind the scenes, SSMS passes the host and port to the SQL Client provider, which then targets the correct TCP endpoint. Remember to verify that the chosen port is open on any network firewalls so your application can reach the database.

Can Galaxy’s SQL editor connect to a SQL Server instance that isn’t using port 1433?

Yes. Galaxy lets you specify a host and port in its connection dialog using the same hostname:port or hostname,port syntax supported by Microsoft’s drivers. Once you enter the custom port, Galaxy’s blazing-fast editor and AI copilot work exactly as they would on the default port—helping you write, optimize, and share SQL while ensuring secure, firewall-friendly connectivity.