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The Secure Shell (SSH) Protocol Assigned Numbers
RFC 4250

Revision differences

Document history

Date By Action
2026-05-20
(System) Changed metadata: changed keywords to '['remote login']' from '[]'
2026-05-20
(System) Metadata update from RFC Editor
2026-05-20
(System)
Changed author "C. Lonvick": changed name from "Chris Lonvick" to "C. Lonvick", changed is_editor from "False" to "True", changed affiliation from "Cisco Systems" to "Cisco …
Changed author "C. Lonvick": changed name from "Chris Lonvick" to "C. Lonvick", changed is_editor from "False" to "True", changed affiliation from "Cisco Systems" to "Cisco Systems, Inc.", cleared country (was "USA"), changed order from "0" to "2"
2026-05-20
(System) Changed author "S. Lehtinen": changed name from "Sami Lehtinen" to "S. Lehtinen", cleared country (was "Finland")
2026-05-20
(System) Metadata update from RFC Editor
2015-10-14
(System) Notify list changed from  to (None)
2006-01-10
Amy Vezza State Changes to RFC Published from RFC Ed Queue by Amy Vezza
2006-01-10
Amy Vezza [Note]: 'RFC 4250' added by Amy Vezza
2006-01-06
(System) RFC published