Did you mean to connect to localhost:1433?

Did you mean to connect to: sqlserver://localhost:1433?

Port 1433 is for SQL Server database connections. Use SSMS, sqlcmd, or your database client to connect.

💡 Pro Tip: Port 1433 is SQL Server's default port. If you're getting connection errors, check if SQL Server service is running and verify Windows authentication settings.

Quick Commands for SQL Server Port 1433

Check if SQL Server is running:
sqlcmd -S localhost
net start mssqlserver (Windows)
sudo systemctl status mssql-server (Linux)
Connect to SQL Server:
sqlcmd -S localhost -E
sqlcmd -S localhost,1433 -U sa -P password
Find what's using port 1433:
lsof -i :1433 (Mac/Linux)
netstat -ano | findstr :1433 (Windows)
Start SQL Server service:
net start mssqlserver (Windows)
sudo systemctl start mssql-server (Linux)

About Port 1433

Port 1433 is the default port for:

Common SQL Server Connection Issues

"A network-related or instance-specific error occurred"

Cannot connect to SQL Server instance:

Solutions:

  • Start SQL Server: net start mssqlserver
  • Check SQL Server Configuration Manager
  • Enable TCP/IP protocol for SQL Server
  • Verify SQL Server is listening on port 1433
  • Check Windows Firewall settings

"Login failed for user"

Authentication error when connecting to SQL Server:

Solutions:

  • Use Windows Authentication: sqlcmd -S localhost -E
  • Reset SA password in SQL Server Management Studio
  • Enable mixed mode authentication
  • Check user permissions and roles
  • Verify SQL Server authentication mode

Related Database Ports

Useful SQL Server Resources

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