TLS Metadata for Load Balancers

Document Type Expired Internet-Draft (individual)
Author Benjamin Schwartz 
Last updated 2020-05-03 (latest revision 2019-10-31)
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Expired & archived
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


A load balancer that does not terminate TLS may wish to provide some information to the backend server, in addition to forwarding TLS data. This draft proposes a protocol between load balancers and backends that enables secure, efficient delivery of TLS with additional information. The need for such a protocol has recently become apparent in the context of split mode ESNI.


Benjamin Schwartz (

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