not sure if my post here will help: https://www.howtoforge.com/communit...rd-ssl-install-help-needed.69753/#post-328754
There are no settings needed, sni is on by default and you can use it with IP and * in website settings. But you should be aware that old clients don't support sni, e.g. Internet Explorer n Windows XP does not support it. There is a nice and detailed page at Wikipedia on the sni topic that lists all min. versions for clients and server software for sni support.