Following the conclusion of the ippcp wg some two years ago, there was no active webpage for efforts related to RFC2393(bis). Now, http://www.shacham.net/ipcomp/ provides such information, for example * The latest and archived rfc2393bis I-D versions along with incremental change reports that were posted to the mailing lists. * The draft interoperability report. * Some ippcp wg history. avram