The IP Security Maintenance and Extensions (ipsecme) WG in the Security Area of the IETF is undergoing rechartering. The IESG has not made any determination yet. The following draft charter was submitted, and is provided for informational purposes only. Please send your comments to the IESG mailing list (iesg@ietf.org) by 2016-09-12. IP Security Maintenance and Extensions (ipsecme) ----------------------------------------------------------------------- Current status: Active WG Chairs: David Waltermire <david.waltermire@nist.gov> Tero Kivinen <kivinen@iki.fi> Assigned Area Director: Kathleen Moriarty <Kathleen.Moriarty.ietf@gmail.com> Security Area Directors: Stephen Farrell <stephen.farrell@cs.tcd.ie> Kathleen Moriarty <Kathleen.Moriarty.ietf@gmail.com> Mailing list: Address: ipsec@ietf.org To subscribe: https://www.ietf.org/mailman/listinfo/ipsec Archive: https://mailarchive.ietf.org/arch/browse/ipsec/ Charter: https://datatracker.ietf.org/doc/charter-ietf-ipsecme/ The IPsec suite of protocols includes IKEv1 (RFC 2409 and associated RFCs), IKEv2 (RFC 7296), and the IPsec security architecture (RFC 4301). IPsec is widely deployed in VPN gateways, VPN remote access clients, and as a substrate for host-to-host, host-to-network, and network-to-network security. The IPsec Maintenance and Extensions Working Group continues the work of the earlier IPsec Working Group which was concluded in 2005. Its purpose is to maintain the IPsec standard and to facilitate discussion of clarifications, improvements, and extensions to IPsec, mostly to IKEv2. The working group also serves as a focus point for other IETF Working Groups who use IPsec in their own protocols. The current work items include: IKEv2 contains the cookie mechanism to protect against denial of service attacks. However this mechanism cannot protect an IKE end-point (typically, a large gateway) from "distributed denial of service", a coordinated attack by a large number of "bots". The working group will analyze the problem and propose a solution, by offering best practices and potentially by extending the protocol. IKEv2 utilizes a number of cryptographic algorithms in order to provide security services. To support interoperability a number of mandatory-to-implement (MTI) algorithms are defined in RFC4307 for IKEv2 and in RFC7321 for ESP/AH. There is interest in updating the MTIs in RFC4307 and RFC7321 based on new algorithms, changes to the understood security strength of existing algorithms, and the degree of adoption of previously introduced algorithms. The group will revise RFC4307 and RFC7321 proposing updates to the MTI algorithms used by IKEv2 and IPsec to address these changes. There is interest in supporting Curve25519 and Curve448 for ephemeral key exchange and EdDSA for authentication in the IKEv2 protocol. The group will extend the IKEv2 protocol to support key agreement using these curves and their related functions. IKEv1 using shared secret authentication was partially resistant to quantum computers. IKEv2 removed this feature to make the protocol more usable. The working group will add a mode to IKEv2 or otherwise modify IKEv2 to have similar quantum resistant properties than IKEv1 had. There have been middle boxes blocking IKE negotiation over UDP. To make IKE work in these environments, IKE and ESP packets need to be transmitted over TCP. Therefore the group will define a mechanism to use IKE and IPsec over TCP. The group will also provide guidance on how to detect when IKE cannot be negotiated over UDP, and TCP should be used as a fallback Split-DNS is a common configuration for VPN deployments, in which only one or a few private DNS domains are accessible and resolvable via the tunnel. Adding new configuration attributes to IKEv2 for configuring Split-DNS would allow more deployments to adopt IKEv2. This configuration should also allow verification of the domains using DNSSEC. Working group will specify needed configuration attributes for IKEv2. Currently, widely used counter mode based ciphers send both the ESP sequence number and IV in form of counter, as they are very commonly the same. There has been interest to work on a document that will compress the packet and derive IV from the sequence number instead of sending it in separate field. The working group will specify how this compression can be negotiated in the IKEv2, and specify how the encryption algorithm and ESP format is used in this case. This charter will expire in December 2017. If the charter is not updated before that time, the WG will be closed and any remaining documents revert back to individual Internet-Drafts. Milestones: Mar 2016 - IETF Last Call on DDoS protection Mar 2016 - IETF Last Call on cryptographic algorithms for IKEv2 Mar 2016 - IETF Last Call on Curve25519 and Curve448 for IKEv2
