Navicat connects to the local MS-SQL server, only localhost can't use 127.0.0.1

 

 

solution:

Open the SQL Server 2019 configuration manager, change the TCP / IP below to enable and restart the SQL Server service

 

 

Note: SQL 2012 is enabled by default, and it is disabled by default after installation of subsequent versions

 

Restart the following services:

 

 

 

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Origin www.cnblogs.com/autumn/p/12750003.html