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RFC 4806
Title: Online Certificate Status Protocol (OCSP)
Extensions to IKEv2
Author: M. Myers, H. Tschofenig
Status: Standards Track
Date: February 2007
Mailbox: mmyers@fastq.com,
Hannes.Tschofenig@siemens.com
Pages: 11
Characters: 21991
Updates/Obsoletes/SeeAlso: None
I-D Tag: draft-myers-ikev2-ocsp-05.txt
URL: http://www.rfc-editor.org/rfc/rfc4806.txt
While the Internet Key Exchange Protocol version 2 (IKEv2) supports
public key based authentication, the corresponding use of in-band
Certificate Revocation Lists (CRL) is problematic due to unbounded
CRL size. The size of an Online Certificate Status Protocol (OCSP)
response is however well-bounded and small. This document defines
the "OCSP Content" extension to IKEv2. A CERTREQ payload with "OCSP
Content" identifies zero or more trusted OCSP responders and is a
request for inclusion of an OCSP response in the IKEv2 handshake. A
cooperative recipient of such a request responds with a CERT payload
containing the appropriate OCSP response. This content is
recognizable via the same "OCSP Content" identifier.
When certificates are used with IKEv2, the communicating peers need a
mechanism to determine the revocation status of the peer's
certificate. OCSP is one such mechanism. This document applies when
OCSP is desired and security policy prevents one of the IKEv2 peers
from accessing the relevant OCSP responder directly. Firewalls are
often deployed in a manner that prevents such access by IKEv2 peers
outside of an enterprise network. [STANDARDS TRACK]
This is now a Proposed Standard Protocol.
STANDARDS TRACK: This document specifies an Internet standards track
protocol for the Internet community,and requests discussion and
suggestions for improvements.Please refer to the current edition of the
Internet Official Protocol Standards (STD 1) for the standardization
state and status of this protocol. Distribution of this memo is
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