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.
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.
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.
---
The key to getting good answers is to ask good questions.
_______________________________________________
users mailing list -- users@lists.fedoraproject.org
To unsubscribe send an email to users-le...@lists.fedoraproject.org
Fedora Code of Conduct:
https://docs.fedoraproject.org/en-US/project/code-of-conduct/
List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines
List Archives:
https://lists.fedoraproject.org/archives/list/users@lists.fedoraproject.org
