Sni hostname. . This way the server knows which website to present when using shared IPs. Server Name Indication (SNI) is a TLS protocol addon. It allows a client or browser to indicate which hostname it is trying to connect to at the start of the TLS handshake. 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. It adds the hostname of the server (website) in the TLS handshake as an extension in the CLIENT HELLO message. As a result, the server can display several certificates on Server Name Indication (SNI) allows the server to safely host multiple TLS Certificates for multiple sites, all under a single IP address. This extension allows the server to identify the specific domain requested by the client. This allows the server to present multiple certificates on the same IP address and port number. 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. We can find the header in the network tab of the developer tool in a web browser. Server Name Indication (SNI) is an extension to the TLS protocol. 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. This is an example of host header when I accessed a Microsoft document. The host header is in RFC 7230, and is used to define the hostname of the HTTP request. [1] During the SSL/TLS handshake, the client sends a Server Name extension in the ClientHello message, which contains the hostname of the requested domain. At the beginning of the TLS handshake, it enables a client or browser to specify the hostname it is attempting to connect to. xjcaang bzmsmis kwfblp rwa othdgiwfa zayb fmpp rloe simzz xaear