> 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.
Right, but they'll only do that if they're aware of such a system and it is significant enough to make a dent in them. Further, it would be a mistake to assume that *just* changing ASN's would be sufficient. The act of changing ASN's could act as a trigger to re-whois ARIN for an update of ownership, for example. The fact is that the information to trigger a re-query of ownership upon a redelegation sort-of already exists, though it is clearly imperfect. My point was that if it was actually useful to "notice" when an IP delegation moved, someone would already have made up a system to do this somehow. So my best guess is that there isn't a really strong incentive to pursue some sort of notification system, because you could pretty much do it as it stands. ... JG -- Joe Greco - sol.net Network Services - Milwaukee, WI - http://www.sol.net "We call it the 'one bite at the apple' rule. Give me one chance [and] then I won't contact you again." - Direct Marketing Ass'n position on e-mail spam(CNN) With 24 million small businesses in the US alone, that's way too many apples.