Easy way to check connectivity to SQL Server from client
A simple test method for SQL connectivity is to create an empty text file, with a file extension of "UDL".  You can create it in Notepad.  And it can have any name.  I use "TestSQL.UDL"

Save it on the desktop of a windows PC and double click it.

A "Data Link Properties" dialog box will pop up where you can enter the IP address of the SQL server and also a SQL username and password.

Click the "Test Connection" button to see if you can connect.