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. The document requests the reassignment of well-known ports in the IANA Service Name and Transport Protocol Port Number Registry from individuals or companies who have registered the port for use before RFC6335 was published to the IESG. The document is well written. It does not change the use of the ports, and so does not raise new security considerations, which is clearly described in the Security Considerations section. As such, the document is ready.