Sni server name identification. Server Name Indication, often abbreviated SNI, is an extension to TLS that allows multiple hostnames to be served over HTTPS from the same IP address. Server Name Indication (SNI) is an extension to the Transport Layer Security (TLS) computer networking protocol by which a client indicates which hostname it is attempting to connect to at the start of the handshaking process. Server Name Indication (SNI) allows the server to safely host multiple TLS Certificates for multiple sites, all under a single IP address. Server Name Indication (SNI) is an extension to the Transport Layer Security (TLS) computer networking protocol by which a client indicates which hostname it is attempting to connect to at the start of the handshaking process. What this effectively means is that the virtual domain name, or a hostname, can now be used to identify the network end point. [1] SNI, or Server Name Indication, is an addition to the TLS encryption protocol that enables a client device to specify the domain name it is trying to reach in the first step of the TLS handshake, preventing common name mismatch errors. Learn why SNI is a crucial extension of the TLS protocol, and where you can use it. 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. It adds the hostname of the server (website) in the TLS handshake as an extension in the CLIENT HELLO message. . It allows a client or browser to indicate which hostname it is trying to connect to at the start of the TLS handshake. Discover what SNI is and how it works. Server Name Indication (SNI) is an extension to the TLS protocol. This allows the server to present multiple certificates on the same IP address and port number. nazqpdcvxyqklaircewfvwlncaxspjdtysfmnkwasxznunfitgqxjo