]> AKAYLA

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sec ssh iana registry This specification updates the registration policies for adding new entries to registries within the IANA "Secure Shell (SSH) Protocol Parameters" group of registries. Previously, the registration policy was generally IETF Review, as defined in RFC 8126, although a few registries require Standards Action. This specification changes it from IETF Review to Expert Review. This document updates RFCs 4250, 4716, 4819, and 8308.

Introduction The IANA "Secure Shell (SSH) Protocol Parameters" registry was populated by several RFCs including , , , and . Outside of some narrow value ranges that require Standards Action in order to add new values or that are marked for Private Use, the registration policy for other portions of the registry was IETF Review . This specification changes the policy from IETF Review to Expert Review. This change is in line with similar changes undertaken for certain IPsec and TLS registries.

Requirements Language The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in BCP 14 when, and only when, they appear in all capitals, as shown here.

SSH Protocol Parameters Affected The following table lists the "Secure Shell (SSH) Protocol Parameters" registries whose registration policy has changed from IETF Review to Expert Review. Where this change applied to a specific range of values within the particular parameter, that range is given in the notes column. Affected registries now list this document as a reference. Secure Shell (SSH) Protocol Parameters Affected

Parameter Name	RFC	Notes
Authentication Method Names
Channel Connection Failure Reason Codes and Descriptions		0x00000001-0xFDFFFFFF (inclusive)
Compression Algorithm Names
Connection Protocol Channel Request Names
Connection Protocol Channel Types
Connection Protocol Global Request Names
Connection Protocol Subsystem Names
Disconnection Messages Reason Codes and Descriptions		0x00000001-0xFDFFFFFF (inclusive)
Encryption Algorithm Names
Extended Channel Data Transfer data_type_code and Data		0x00000001-0xFDFFFFFF (inclusive)
Extension Names
Key Exchange Method Names
MAC Algorithm Names
Pseudo-Terminal Encoded Terminal Modes
Public Key Algorithm Names
Publickey Subsystem Attributes
Publickey Subsystem Request Names
Publickey Subsystem Response Names
Service Names
Signal Names
SSH Public-Key File Header Tags		Excluding header-tags beginning with x-

The only IANA SSH protocol parameter registries not affected are "Message Numbers" and "Publickey Subsystem Status Codes", as these remain Standards Action due to their limited resources as one-byte registry values.

Designated Expert Pool Expert Review registry requests are registered after a three-week review period on the <ssh-reg-review@ietf.org> mailing list, and on the advice of one or more designated experts. However, to allow for the allocation of values prior to publication, the designated experts may approve registration once they are satisfied that such a specification will be published. Registration requests sent to the mailing list for review SHOULD use an appropriate subject (e.g., "Request to register value in SSH protocol parameters <specific parameter> registry"). Within the review period, the designated experts will either approve or deny the registration request, communicating this decision to the review list and IANA. Denials MUST include an explanation and, if applicable, suggestions as to how to make the request successful. Registration requests that are undetermined for a period longer than 21 days can be brought to the IESG's attention (using the <iesg@ietf.org> mailing list) for resolution. Criteria that SHOULD be applied by the designated experts includes determining whether the proposed registration duplicates existing functionality (which is not permitted), whether it is likely to be of general applicability or useful only for a single application, and whether the registration description is clear. IANA MUST only accept registry updates from the designated experts and the IESG. It SHOULD direct all requests for registration from other sources to the review mailing list. It is suggested that multiple designated experts be appointed who are able to represent the perspectives of different applications using this specification, in order to enable broadly informed review of registration decisions. In cases where a registration decision could be perceived as creating a conflict of interest for a particular expert, that expert SHOULD defer to the judgment of the other experts.

IANA Considerations This memo is entirely about updating the IANA "Secure Shell (SSH) Protocol Parameters" registry.

Security Considerations This memo does not change the Security Considerations for any of the updated RFCs.

References Normative References Informative References message to the Curdle mailing list

Acknowledgements The impetus for this specification was a February 2021 discussion on the CURDLE mailing list .