Re: [nfsv4] Benjamin Kaduk's Discuss on draft-ietf-nfsv4-rpc-tls-08: (with DISCUSS and COMMENT)
Chuck Lever <chuck.lever@oracle.com> Tue, 01 September 2020 15:26 UTC
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From: Chuck Lever <chuck.lever@oracle.com>
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Date: Tue, 01 Sep 2020 11:26:21 -0400
Cc: The IESG <iesg@ietf.org>, draft-ietf-nfsv4-rpc-tls@ietf.org, nfsv4-chairs@ietf.org, nfsv4@ietf.org
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To: Benjamin Kaduk <kaduk@mit.edu>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/nfsv4/Sxprneg43zRO1k-7q2dkFKwNuEA>
Subject: Re: [nfsv4] Benjamin Kaduk's Discuss on draft-ietf-nfsv4-rpc-tls-08: (with DISCUSS and COMMENT)
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> On Jul 8, 2020, at 2:56 AM, Benjamin Kaduk via Datatracker <noreply@ietf.org> wrote: > > Benjamin Kaduk has entered the following ballot position for > draft-ietf-nfsv4-rpc-tls-08: Discuss > > When responding, please keep the subject line intact and reply to all > email addresses included in the To and CC lines. (Feel free to cut this > introductory paragraph, however.) > > > Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html > for more information about IESG DISCUSS and COMMENT positions. > > > The document, along with other ballot positions, can be found here: > https://datatracker.ietf.org/doc/draft-ietf-nfsv4-rpc-tls/ > > > > ---------------------------------------------------------------------- > DISCUSS: > ---------------------------------------------------------------------- > > (8) Can we clarify the status of DNSSEC (or DANE) requirements? Section 1 > assumes that support for DNSSEC is already available in an RPC > implementation, but Section 7.1.1 says that "Clients [sic] implementors can > choose from" a list of things including DANE TLSA records. Why would we > require DNSSEC support but not using the records if they're present? OK, I'm parsing this comment more closely now. The statement in Section 1 you refer to above is: The protocol specification in the current document assumes that support for RPC, TLS, PKI, GSS-API, and DNSSEC is already available in an RPC implementation where TLS support is to be added. I hadn't counted this as a "requirement" since a BCP14 keyword is not used, and because it appears in the Introduction as background material. Section 7.1.1 currently says this: Clients implementers can choose from the following to mitigate STRIPTLS attacks: * A TLSA record [RFC6698] can alert clients that TLS is expected to work, and provide a binding of hostname to X.509 identity. If TLS cannot be negotiated or authentication fails, the client disconnects and reports the problem. * Client security policy can require that a TLS session is established on every connection. If an attacker spoofs the handshake, the client disconnects and reports the problem. If TLSA records are not available, this approach is strongly encouraged. Here, it is assumed that the RPC-over-TLS implementation has DNSSEC support. What is not assumed is that the peer always operates in an environment where the DNS administrator has configured TLSA records. I'm open to suggestions on how to structure this section more clearly. -- Chuck Lever
- [nfsv4] Benjamin Kaduk's Discuss on draft-ietf-nf… Benjamin Kaduk via Datatracker
- Re: [nfsv4] Benjamin Kaduk's Discuss on draft-iet… David Noveck
- Re: [nfsv4] Benjamin Kaduk's Discuss on draft-iet… Chuck Lever
- Re: [nfsv4] Benjamin Kaduk's Discuss on draft-iet… Benjamin Kaduk
- Re: [nfsv4] Benjamin Kaduk's Discuss on draft-iet… Chuck Lever
- Re: [nfsv4] Benjamin Kaduk's Discuss on draft-iet… Benjamin Kaduk
- Re: [nfsv4] Benjamin Kaduk's Discuss on draft-iet… Chuck Lever
- Re: [nfsv4] Benjamin Kaduk's Discuss on draft-iet… Chuck Lever
- Re: [nfsv4] Benjamin Kaduk's Discuss on draft-iet… Benjamin Kaduk
- Re: [nfsv4] Benjamin Kaduk's Discuss on draft-iet… Chuck Lever
- Re: [nfsv4] Benjamin Kaduk's Discuss on draft-iet… Chuck Lever
- Re: [nfsv4] Benjamin Kaduk's Discuss on draft-iet… Chuck Lever
- Re: [nfsv4] Benjamin Kaduk's Discuss on draft-iet… Chuck Lever
- Re: [nfsv4] Benjamin Kaduk's Discuss on draft-iet… David Noveck
- Re: [nfsv4] Benjamin Kaduk's Discuss on draft-iet… Chuck Lever
- Re: [nfsv4] Benjamin Kaduk's Discuss on draft-iet… David Noveck
- Re: [nfsv4] Benjamin Kaduk's Discuss on draft-iet… Benjamin Kaduk
- Re: [nfsv4] Benjamin Kaduk's Discuss on draft-iet… Benjamin Kaduk
- Re: [nfsv4] Benjamin Kaduk's Discuss on draft-iet… Benjamin Kaduk
- Re: [nfsv4] Benjamin Kaduk's Discuss on draft-iet… David Noveck