[tor-dev] [::]/8 is marked as private network, why?

[Tom Ritter]

On 29 March 2016 at 02:29, Sebastian Hahn <hahn.seb at web.de> wrote:
> I've been wondering about the private_nets const in src/or/policies. It
> was added in a96c0affcb4cda1a2e0d83d123993d10efc6e396 but Nick doesn't
> remember why, and I'm hoping someone has an idea (maybe teor, who I've
> CCed here, who documented this in a later commit?). If nobody knows why
> we do this I think we should remove it as likely incorrect.

0000::/8 is Reserved by the IETF, it is (a superset of) the deprecated
space for "IPv4 Compatible IPv6 Addresses".  The addresses are not to
be reassigned for any other purposes.

Authoritative source:
http://www.iana.org/assignments/ipv6-address-space/ipv6-address-space.xhtml

I'm not necessarily sure what private networks are all used for in
Tor, but maybe this explains it and makes sense?

-tom