To connect to SQL Server from another computer, you normally use TCP/IP. If TCP/IP is not enabled, right-click TCP/IP, and then click Enable. If you changed the enabled setting for any protocol, restart the Database Engine. In the left pane select SQL Server Services.
I am able to connect to remote SQL server using SQL Server Management Studio on my machine whereas, when I try the DB connectivity from Katalon Studio, it throws The TCP/IP connection to the host has failed.