Visual Studio连接Azure SQL Server报错：目标机器主动拒绝连接

Hey Kelvin, sorry to hear you're stuck on connecting your Azure SQL Server through Visual Studio's Server Explorer. Let's go through some targeted checks to get this sorted out—these are the steps I usually recommend when folks hit this exact problem:

• Confirm your authentication details match what's set in Azure
  When you created the SQL Server, did you use SQL Server authentication or Azure AD?

  • For SQL auth: Make sure you're using the exact admin username and password you set during server creation (capitalization matters here!).
  • For Azure AD auth: Ensure the Azure account you're signed into in Visual Studio has been granted access to the SQL Server (you can check this in Azure Portal under SQL Server > Access control (IAM)).

• Double-check Azure firewall rules (don't skip this!)
  Even though you added your IP, there are a couple more things to verify in Azure Portal:

  1. Navigate to your SQL Server resource > Firewalls and virtual networks
  2. Make sure the toggle for Allow Azure services and resources to access this server is turned on—Visual Studio often uses Azure's backend services to facilitate connections, so this is critical.
  3. Confirm your IP rule is correctly listed (no typos in the IP address, and it's not set to expire if you created a temporary rule).

• Inspect the SQL Server Object Explorer connection prompt
  When the password prompt pops up, take a second to verify:

  • The server name is the full Azure SQL address: your-server-name.database.windows.net (sometimes the explorer might truncate it or pull an outdated entry).
  • You've selected the right authentication type (match what you set up in Azure—SQL Server Auth vs Azure AD).
  • If you're targeting a specific database, make sure you select it instead of leaving it as the default master (though master should still work if you have permissions).

• Test with SQL Server Management Studio (SSMS) to isolate the issue
  Sometimes Visual Studio's explorer has cached configs or glitches. Try connecting to the same server with SSMS:

  • If SSMS also fails: The problem is likely on Azure's end or your network (see next point).
  • If SSMS works: Reset Visual Studio's settings (Tools > Options > Environment > General > Reset Settings) or update to the latest version—this often clears up connection-related bugs.

• Check for network port restrictions
  Even with local firewall off, your router or corporate network might block outbound traffic on port 1433 (Azure SQL's default port). Test this by running telnet your-server-name.database.windows.net 1433 in Command Prompt. If you get a "Could not open connection" error, you'll need to work with your network admin to open this port.

• Verify the Azure SQL Server is online
  Quick check in Azure Portal: Go to your SQL Server's overview page and ensure the status is "Online". If there's a maintenance event or outage, that could block connections until it's resolved.

Hope one of these steps gets you connected! Let me know if you need to dig deeper into any of these.

内容的提问来源于stack exchange，提问作者kelvinmac