Re: [secdir] Secdir review of draft-ietf-mboned-mtrace-v2-21

[Derrell Piper <[e-mail]>]

[Apologies for the repost, hopefully this one doesn’t wrap.  I also didn’t
include the “.all” suffix on the previous email.]

Reviewer: Derrell Piper
Review result: ready with nits

I have reviewed this document as part of the security directorate's
ongoing effort to review all IETF documents being processed by the IESG.
These comments were written primarily for the benefit of the security
area directors.  Document editors and WG chairs should treat these
comments just like any other last call comments.

This document describes a new version of tracroute designed for
multicast.  In the multicast environment, traceroute functions in
reverse with each router on the path back towards the client adding
diagnostic information along the way.  This information can be used to
diagnose a variety of network problems, including packet loss
(congestion) and configuration problems (TTL).

The security considerations section discusses a variety of requirements
and suggestions for multicast routers and the protocol includes an
ADMIN_PROHIB flag which can be used at a border router to prevent
multicast traceroute from being able to probe network topology or to
perform traffic analysis.

This appears to be a useful diagnostic utility and the obvious security
concerns seem to have been addressed.

nits:

page 33, section 9.3 and 9.4

MAY should be capitalized in these two sections.

Derrell