TCP Encapsulation of IKE and IPsec Packets (RFC8229)
Original Publication Date: 2017-Aug-01
Included in the Prior Art Database: 2017-Aug-13
Internet Society Requests For Comment (RFCs)
T. Pauly: AUTHOR [+2]
The Internet Key Exchange Protocol version 2 (IKEv2) [RFC7296] is a protocol for establishing IPsec Security Associations (SAs), using IKE messages over UDP for control traffic, and using Encapsulating Security Payload (ESP) [RFC4303] messages for encrypted data traffic. Many network middleboxes that filter traffic on public hotspots block all UDP traffic, including IKE and IPsec, but allow TCP connections through because they appear to be web traffic. Devices on these networks that need to use IPsec (to access private enterprise networks, to route Voice over IP calls to carrier networks, or because of security policies) are unable to establish IPsec SAs. This document defines a method for encapsulating IKE control messages as well as IPsec data messages within a TCP connection.
Internet Engineering Task Force (IETF) T. Pauly Request for Comments: 8229 Apple Inc. Category: Standards Track S. Touati ISSN: 2070-1721 Ericsson R. Mantha Cisco Systems August 2017
TCP Encapsulation of IKE and IPsec Packets
This document describes a method to transport Internet Key Exchange Protocol (IKE) and IPsec packets over a TCP connection for traversing network middleboxes that may block IKE negotiation over UDP. This method, referred to as "TCP encapsulation", involves sending both IKE packets for Security Association establishment and Encapsulating Security Payload (ESP) packets over a TCP connection. This method is intended to be used as a fallback option when IKE cannot be negotiated over UDP.
Status of This Memo
This is an Internet Standards Track document.
This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Further information on Internet Standards is available in Section 2 of RFC 7841.
Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at http://www.rfc-editor.org/info/rfc8229.
Pauly, et al. Standards Track [Page 1]
RFC 8229 TCP Encapsulation of IKE and IPsec Packets August 2017
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