Privacy Extensions for Stateless Address Autoconfiguration in IPv6 On Mon, 7 Dec 2020 at 05:18, Ed Greshko <ed.gres...@greshko.com> wrote:
> On 07/12/2020 11:11, Tim via users wrote: > > On Sun, 2020-12-06 at 15:43 -0400, George N. White III wrote: > >> As more systems use IPv6, bad actors will have to collect > >> active IPv6 addresses. You may be one of the first to see that > >> start. > > I have to wonder how that's going to go. With IPv4 most people were > > behind NAT (which isn't a firewall but does get in the way of external > > traffic). IPv6 is supposed to aid us in not needing to do NAT anymore, > > so more things could be directly addressable from the outside world. A > > nd understanding IPv6 addresses is more complicated. > > > > On the subject of "collect active IPv6 addresses", that is rather a > complicated issue. > That just means service providers can charge more for data that links IPv6's to customers by time-intervals. > > Unlike IPv4 and DHCP deployment by ISPs which tend to result in the same > IP address being > assigned to users. I've noticed that ISPs tend to use IPv6 Stateless > Address Autoconfiguration (rfc4862). > If you check the email headers from home_user you'd see that he has a > different IPv6 address > on different days. > Again, adds value to ISP's data. There is rfc4941 -- Privacy Extensions for Stateless Address Autoconfiguration in IPv6 > > His ISP is Comcast and the IPv6 address space they have is > 2001:558:6040::/48. That address space > has 1208925819614629174706176 addresses. Of course the ISPs will segment > this address space > so the address space in a user's area will be less, but not insignificant. > > I happen to have contracted with my ISP for fixed IPv4 and IPv6 > addresses. The address space > assigned to me for IPv6 is 2001:b030:112f:0000::/56 or > 4722366482869645213696 addresses. > I've segmented this into 256 networks of /64 where each subnet has > 18,446,744,073,709,551,616 > addresses. > Address hopping (6HOP) might add enough complexity to blow up your ISP's database: https://publications.sba-research.org/publications/201707%20-%20JUDMAYER%20-%20LightweightAddressHopping.pdf Wondering what the CO2 footprint of IPv6 address generation will be? -- George N. White III
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