Other examples use the SCIM with a FIDO Device Onboard Extension 
(draft-ietf-scim-device-model) and then use an EAP-TLS dialog with TOFU to 
enable IP connection to a restricted network segment that permits the 
provisioning of a new credential using the FIDO Alliance’s TO2 protocol.

Cheers,
Mark



Cisco Confidential

From: Michael Richardson <[email protected]>
Date: Friday, 7 November 2025 at 14:59
To: [email protected] <[email protected]>
Subject: [Emu] Re: draft-richardson-emu-eap-onboarding: authentication


Alexander Clouter <[email protected]> wrote:
    > I am unable to find a description of what should go into the server
    > certificate or how, if at all, the client should authenticate it.

It's a huge problem in EAP-TLS, period, isn't it :-)
Solved only via explicit client configuration for the anchor.

    > I rummaged around the mailing list but was unable to find anything
    > though for some reason I recall discussion that the client would either
    > completely ignore the server or did that get later changed to be a
    > subject/SAN and/or usage OID check only?

For the purposes of IoT onboarding (using a variety of mechanism), the
relevant protocol would wind up programming/provisioning the appropriate
trust anchor.  Until then, it's an unverified situation.  In RFC8995, we call
this a "provisional TLS".

The human-operated systems that wind up on a portal-gated network, then what
I envision is that the portal interaction could wind up with a download of a
configuration file to the client.

It would be nice if we could standardize something like:
  
https://learn.microsoft.com/en-us/windows-server/networking/technologies/extensible-authentication-protocol/network-access?tabs=eap-tls%2Cserveruserprompt-eap-tls%2Ceap-sim#xml-profiles-for-eap
I think that there are several other bespoke systems like this.
I believe that most enterprises "solve" this problem with an MDM, but there is
still a challenge for BYOD, for personal devices that one does not want an MDM 
on.

--
Michael Richardson <[email protected]>, Sandelman Software Works
 -= IPv6 IoT consulting =-                      *I*LIKE*TRAINS*



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