A DNS Resource Record for TLS Server Name Indication (DNS SNI)

Document Type Expired Internet-Draft (individual)
Last updated 2017-08-21 (latest revision 2017-02-17)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


The SNI record type allows a domain owner to specify the "server name" to indicate in TLS connections, if it is different from the domain name. This allows domains that use shared hosting and wildcard or multi-domain (UCC) certificates to change the only domain name shown in cleartext, to prevent a passive adversary from identifying exactly which domain a user is accessing.


Benjamin Schwartz (bemasc@google.com)

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)