Server Name Indication (SNI) is an extension to the TLS protocol that provides the hostname that the client is connecting to. This allows a server to support and provide multiple SSL certificates on the same IP address and port number and hence allows multiple secure (HTTPS) websites (or any other service over TLS) without the need for individual dedicated IPs for each domain.
Previous version of TLS, which we had used with all our servers, didn’t recognize HTTPS requests that contained domain name. It only worked correctly only if an IP address was “asked”. Thus it was a requirement to have a dedicated IP for each domain that used a secured connection.
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Now, with the cPanel version 11.38 and higher, we are able to use SNI.
Server Name Indication (SNI) is an extension to the TLS protocol that indicates what hostname the client is attempting to connect.
This allows a server to present multiple certificates on the same IP address and port number and hence allows multiple secure (HTTPS) websites (or any other service over TLS).
However, unfortunately there are a few issues that might appear:
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