RFC 8446, "The Transport Layer Security (TLS) Protocol Version 1.3", August 2018

Errata ID: 6139
Status: Verified
Type: Editorial
Publication Format(s) : TEXT
Reported By: Ben Smyth
Date Reported: 2020-04-29
Verifier Name: Paul Wouters
Date Verified: 2024-03-29

Section 4.4.2.2. says:

As servers MAY require the presence of the "server_name" extension, clients
SHOULD send this extension, when applicable.

It should say:

As servers MAY require the presence of the "server_name" extension, client
SHOULD send this extension.

Notes:

Since it is unclear when it is applicable for a server to send the extension, dropping "when applicable"
seems appropriate. Alternatively, giving some extra guidance would be useful.

Paul Wouters(AD): Resolved with alternative Corrected Text:

As servers MAY require the presence of the "server_name" extension, clients SHOULD send this extension when the server is identified by name.

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