On Tue, 8 Sep 2009, Joe Greco wrote:
It seems like it *could* be useful to have a system to notify of network delegation changes, but it also seems like if this was particularly important to anyone, then someone would have found a trivial way to implement at least a poor man's version of it. For example, record the ASN of a blocked IP address and remove the block when the ASN changes...
That too, would be easily gamed by spammers. Just get multiple ASN's and bounce your dirty IPs around between them to clean them. The IP space being a direct (RIR->LIR) allocation having been made after the blocking was initiated is a pretty clear sign that the space has actually changed hands, and seems like it would be fairly difficult (if at all possible) to game. ---------------------------------------------------------------------- Jon Lewis | I route Senior Network Engineer | therefore you are Atlantic Net | _________ http://www.lewis.org/~jlewis/pgp for PGP public key_________