Server Name Indication (SNI) in Win 2012 Server / IIS 8.0
What is SNI? On Windows Server 2012, IIS supports Server Name Indication (SNI), which is a TLS extension to include a virtual domain as a part of SSL negotiation. What this effectively means is that the virtual domain name, or a hostname, can now be used to identify the network end point What is the Problem with Win 2008 R2 Or IIS 7.0 / 7.5? It is not possible When I want multiple https sites to be hosted using 443 port on Win 2008 R2 (IIS 7.0/7.5) server which has single IP. While trying to host so, IIS won’t allow doing so and if we force then the SSL cert will be replaced on another site already on 443 port. So the only solution is to get additional IPs and bind the same to https sites on 443 port. Let’s see this in action… Below is an IIS Site running on 443 port, just think of as a typical SharePoint’s web application. Here we have single IP and https binded to 443. Now if I want to create another site with same IP and https on 443, not possible. We wi