rootninja

Here’s the official registry of address space assignments - IANA IPv4 Address Space Registry

IANA predicts all address blocks will be completely assigned by late 2011. I guess the real switch to IPv6 will be a forced one after all.

The interesting part is 1/8 was just allocated. That’s hard to look at without reading it as one-eighth! I wonder if any interesting private traffic will get routed to the official holders of these addresses? I’m just imagining a gateway on a 1 network purposely trying to accept traffic from all over the place. If any 1.255.255.255 broadcast spam makes it out of some networks, it might make for an interesting study.

Perhaps poorly configured corporate firewalls are using a 1/x range as a private network. Crash and burn? Maybe they didn’t think of the possibility of external 1/x traffic attempting to come in, so that could prove interesting.

My first thought was some sort of one-way blind attack into your network, like bluetooth injection, but now i’m thinking it would be like instant VPN access. Once you’ve authenticated with a corporate VPN device, you’re usually trusted with an internal interface with some sort of limited netmask, but any netmask under 1/8 would be bad. Firewalls never seem to be very concerned with internal networks. At most, you’re usually just limited to a single VLAN, free to roam within those walls.

Anyone relying on just a NAT for security might want to start praying now.