I need to setup a SFTP in a DMZ. I have MS Server 2016 running IIS in DMZ ready to be configured. What is the best way to setup SFTP for external clients/customer? Can you provide your expert advice as well as some step-by-step. I like SFTP over FTPS as it provides encryption over a single port number, and I do not want to open up any more ports then I need to.