Blacklisted space is really quite different though, isn't it? There is a big difference between the new address holder's email being rejected somewhere because of an RBL and the new address holder being able to amass a list of infected/vulnerable users based on traffic they are passively receiving, just by routing the prefix. In the RBL case you know who you are trying to send mail to and you may know what blacklist is being used - the new address block holder has tools to help resolve their problem. These infected users don't know they are sending this traffic, they don't know who its going to, be it the original bad guys or some new guys. The new org that has the netblock can't do anything to stop this traffic from coming, which means they'll have to pay for it in bandwidth consumption, resources on the host when they put the IP's into service, and resources to filter. (Not every IP in the netblock is getting DNSChanger traffic) I fully get that receiving unwanted traffic is just part of being on the internet - but I think the volume and type of traffic that DNSChanger IP's are getting, and what it reveals, is something quite different than what we've seen in the past, for both the resource holder and the infected users. Yes, the scarcity of v4 space WILL mean that IP blocks will be assigned more quickly. ARIN has said as much in a public statement that outlines their plans for depletion. I don't know what RIPE's policy had been - or if it had always been 6 weeks. --Heather On Wed, Aug 15, 2012 at 9:47 AM, "Michele Neylon :: Blacknight" <michele@blacknight.ie> wrote:
We've ended up with IP space that had a "reputation" in the past
It's quite annoying to discover that you IP block, or a part of it, is blacklisted before you even get a chance to use it ..
Though I wonder is the overall scarcity of IPv4 space going to mean that IP blocks will end up being reassigned more quickly as there's fewer and fewer ..
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