[secdir] sec-dir review of draft-ietf-tcpm-persist-04.txt

[Derek Atkins <[e-mail]>]

Hi,

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 clarifies the Zero Window Probes (ZWP) described in
   Requirements for Internet Hosts [RFC1122].  In particular, it
   clarifies the actions that can be taken on connections which are
   experiencing the ZWP condition.

The security considerations section should refer to section 4 as a
description of the DoS attack, not section 3.  Although it should
still refer to section 3.

Honestly, I find it confusing that the attack is described after some
of the mitigation techniques.  It would make the document flow better,
IMHO, if you describe the attack and then describe how to mitigate the
attack.

The document also mentions orphaned connections but does not mention
how to mitigate an attack against systems that have orphaned
connections.

-derek

-- 
       Derek Atkins                 617-623-3745
       [e-mail]             www.ihtfp.com
       Computer and Internet Security Consultant