Last Call Review of draft-ietf-opsec-ip-options-filtering-05

Request Review of draft-ietf-opsec-ip-options-filtering
Requested rev. no specific revision (document currently at 07)
Type Last Call Review
Team General Area Review Team (Gen-ART) (genart)
Deadline 2013-09-30
Requested 2013-09-19
Authors Fernando Gont, R. Atkinson, Carlos Pignataro
Draft last updated 2013-11-18
Completed reviews Genart Last Call review of -05 by Suresh Krishnan (diff)
Assignment Reviewer Suresh Krishnan
State Completed
Review review-ietf-opsec-ip-options-filtering-05-genart-lc-krishnan-2013-11-18
Reviewed rev. 05 (document currently at 07)
Review result Almost Ready
Review completed: 2013-11-18


I have been selected as the General Area Review Team (Gen-ART) reviewer

for this draft (for background on Gen-ART, please see


Please wait for direction from your document shepherd or AD before

posting a new version of the draft.


Document: draft-ietf-opsec-ip-options-filtering-05.txt

Reviewer: Suresh Krishnan

Review Date: 2013/11/17

IESG Telechat date: 2013/11/21


Summary: This draft is almost ready for publication as a BCP but

I do have some issues that you may wish to consider


* Sections 4.12.5 and 4.13.5


Since these options are supposed to be used in closed environments,

how likely are these options to appear in the wild? Even if they do,

isn’t it a symptom of a misconfiguration somewhere. Given this, I

would have expected the recommendation to read


Routers, security gateways, and firewalls … SHOULD by default drop

packets because they contain this option…


but the recommendation is “SHOULD NOT by default”. I think It would

be good if there was some reasoning attached to this recommendation.

Without such reasoning, I think this recommendation will probably not

be followed.


* Section 4.22.5


Have you considered that the default behavior for the option could be related

to the option class. E.g. Class 2 would default to ignore and forward and

class 0 would default to drop and log.


* Section 4.23.4


It would be good to specify a default for this knob.