Until last week I was able to access my SQLServer Express 2019 using the SQL autentification and the SERVER NAME. Suddenly the performance was extremely slow. Contacting the SQL Server from a Client withSSMS lasts 1 minute, the databases are visible after further 2-3 minutes. Access to the connection string fromVisual Studio 2017 is impossible - timeout error. Interestingly,there is no problem with the SSMS, when I use the IP adress to login to the server. Further, from a clientping with the IP adress of the server and ping with the server name is fast.
On the Server inself, access to the SQL- database using SSMS is without any problem, and the firewall is configured OK: in the SQL Configuration Program TCP is activated and port 1433 (+UDP 1434) entered. BTW, the firewall cannot be the
problem, since I reach the server from the client when I use the IP adress to login. An a reinstallation of the SQL server did not solve the problem.
In conclusion, the server-name-problem occurs with different programs (Visual Studio and SSMS). Now, I have a serious problem: I have to change the connection string in Visual Studio, but I even get a timeout error when I try this. Has anyone an
idea?