On Jan 31, 2024, at 12:48 AM, Rubens Kuhl <rube...@gmail.com> wrote:
DoD's /8s are usually squatted by networks that run out of private IPv4 space.
Even though it is very risky to steal resources from an organization
that can deploy a black helicopter or a nuclear warhead over you, for
some reason like it not appearing in the DFZ people seem to like it.
Folks -
A network that wants to be creative and utilize an address block that’s
assigned to others
for their own internal purposes runs two distinct risks:
1. An address block that’s not utilized today may easily become publicly routed
tomorrow
(either by the original address holder or by their assignee/successor) and
it is not possible
to reliably predict whether your customers will need access to the
resources that end up
on that address space.
2. If you should leak routes publicly for another's address space, there are
organizations that
will object – and in the case US government networks, this can include some
uncomfortable
conversations. [1]
None of this suggests that one cannot configure their routers any way that they
wish – just that
it’d be best if done with appropriate care and an upfront understanding of the
risks involved.
Thanks!
/John
John Curran
President and CEO
American Registry for Internet Numbers
[1]
https://pc.nanog.org/static/published/meetings/NANOG77/2108/20191028_Elverson_Your_As_Is_v1.pdf
pg 4.
