Last Call Review of draft-ietf-tcpm-persist-
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
The document also mentions orphaned connections but does not mention
how to mitigate an attack against systems that have orphaned
Derek Atkins 617-623-3745
derek at ihtfp.com www.ihtfp.com
Computer and Internet Security Consultant