The IESG has approved the Internet-Draft 'Mobile IP Challenge/Response
Extensions' <draft-ietf-mobileip-challenge-13.txt> as a Proposed
Standard. This document is the product of the IP Routing for
Wireless/Mobile Hosts Working Group.
The IESG contact persons are David Oran and Rob Coltun.
Technical Summary
Mobile IP, as originally specified, defines an authentication
extension (the Mobile-Foreign Authentication extension) by
which a mobile node can authenticate itself to a foreign agent.
Unfortunately, this extension does not provide ironclad replay
protection, from the point of view of the foreign agent, and does
not allow for the use of existing techniques (such as CHAP) for
authenticating portable computer devices. This specification,
defines extensions for the Mobile IP Agent Advertisements and
the Registration Request that allow a foreign agent to a use
challenge/response mechanism to authenticate a mobile node that
is roaming in it's serving area.
Working Group Summary
----------------------
Two WG last calls have been completed on this draft since October '99,
the most recent one in Jan 2000. The draft has undergone multiple
revisions based on the feedback received by the authors via the discussion
list and also at IETF46. WG members have not expressed any dissent about
this draft. The TIA 45.6 body has been very supportive of this draft as
this spec is a key component of the 3 wireless data architetcure put
forth by them.
Protocol Quality
----------------
The proposal in this I-D is the addition of three new extensions to
Mobile IP.
1. Mobile IP Agent Advertisement Challenge Extension
- Part of Agent Advertisement
2. MN-FA Challenge Extension
- Registration request from the MN to the FA
3. Generalized Mobile IP Authentication Extension
- This spec specifies the MN-AAA Authentication subtype
associated with the Generalized Auth extension.
This is also included in the Reg request coming from the MN
Implementations of this I-D exist. The exact number is not known at this
time. Mobile IP implementations at Connectathon 2000 (1st week of March)
will be testing this feature. The results will be posted therefater.
This specification was reviewed for the IESG by Dave Oran.
Note to RFC Editor:
1) In Section 7 (Reserved SPIs for Mobile IP), please replace
http://www.isi.edu/in-notes/iana/assignments/mobileip-numbers.
with
http://www.iana.org/numbers.html
2) In Section 11 (IANA Considerations), please replace
must be specified and approved by the Mobile IP working group
with
must be specified and approved by a designated expert.
