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 draft basically provides additional (mostly finer grained) filters that have previous definitions in other specifications. I agree with this draft's assertion that security requirements associated with filters in this draft are (and should be) consistent with the definitions provided in other specifications. The Security Considerations section does a credible job of providing pointers to security requirements in other related specifications. I found the pointers to other specifications particularly useful in locating security requirement of the "basic" filters that this document extends. Russ