I have Ubuntu 14.04 LTS + ISPC 3.1. I would like to setup SNI. This server has one IP and he will have setup many websites. Each from website will have own ssl certificate from lets encrypt. Question is - how setup SNI? On another server from another hosting company customer support setup SNI on the server and I can setup for each website own ssl letsencrypt cert. I would like to know how to do this.