I have a few clients which are having issue with direct SQL connections after updating windows to the latest feature update 2004!
Basically the systems are able to open a telnet session fine on the 1433 so I am confident that its not a lower layer issue but applications like SSMS can't connect out!
I have even updated to KB4571744 to see if that helps but no..
My test system which I am using for diagnostics is running build 19041.488
My first set of tests have been trying to disable/override all the new security stuff but without any success.
Anyone seen this or know further diagnostic/fixes I could try? Thanks, Richard.
Fixed! the issue was that the new 2004 update stops TLS below 1.2, understandably! The server we are connecting to happened to be a little old! Updated the server and all works fine! :)