nanog mailing list archives

Re: route: 0.0.0.0/32 in LEVEL3 IRR


From: Tom Beecher <beecher () beecher cc>
Date: Thu, 1 Feb 2024 11:05:33 -0500

Yes, absolutely. That's part of the technical risk that you take if you
decide to do such things.

If it's a "good" choice or not is entirely situational. Some organizations
are fine with kicking that tech debt down the road, others like to double
down and create a house of cards.

On Thu, Feb 1, 2024 at 2:21 AM Frank Habicht <geier () geier ne tz> wrote:

On 01/02/2024 01:45, Tom Beecher wrote:
Seems a bit dramatic. Companies all over the world have been using other
people's public IPs internally for decades. I worked at a place 20 odd
years ago that had an odd numbering scheme internally, and it was
someone else's public space. When I asked why, the guy who built it said
"Well I just liked the pattern."

If you're not announcing someone else's space into the DFZ, or
otherwise trying to do anything shady, the three letter agencies aren't
likely to come knocking. Doesn't mean anyone SHOULD be doing it, but
still.

Well...

If you're using 20.20.20.0/24 which is not "yours" (as I've seen
happen), then certainly your customers can't get to the real 20.20.20.x
And even if that's not announced and used /today/ - this can change
quickly...

Frank


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