remote admin connections (server configuration option)
Applies to: SQL Server
SQL Server provides a dedicated administrator connection (DAC). You can use the DAC to execute diagnostic functions or Transact-SQL statements, or to troubleshoot problems on the server, even when the server is locked or running in an abnormal state and not responding to a SQL Server Database Engine connection.
By default, the DAC is only available from a client application directly on the server. To enable client applications on remote computers to use the DAC, use the remote admin connections option of
By default, the DAC only listens on the loop-back IP address (127.0.0.1), port 1434. If TCP port 1434 isn't available, a TCP port is dynamically assigned when the Database Engine starts up. When more than one instance of SQL Server is installed on a computer, check the error log for the TCP port number.
The following table lists the possible values for the remote admin connections option.
|0||Only local connections are allowed by using the DAC.|
|1||Remote connections are allowed by using the DAC.|
The following example enables the DAC from a remote computer:
EXEC sp_configure 'remote admin connections', 1; GO RECONFIGURE; GO
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