One item that is currently before the ARIN Advisory Council is a suggestion that we publish a map of all currently allocated IP space and keep that map up to date. If we do this then I think it solves this problem if people keep verifying their filters against the map or if they generate their filters based on the map.
You mean like ftp://ftp.isi.edu/in-notes/iana/assignments/ipv4-address-space ???? One which may be usefull is registering the 'unassigned' IANA blocks in the IRR with a special AS number (e.g. AS0 or AS65535) so people can use the RtConfig tools to create filters by exception (e.g. NOT AS0) But there is already so much junk like 0.0.0.0/1 in there already, I hesitate doing it. -- Sean Donelan, Data Research Associates, Inc, St. Louis, MO Affiliation given for identification not representation