nanog mailing list archives

Re: route: 0.0.0.0/32 in LEVEL3 IRR


From: Owen DeLong via NANOG <nanog () nanog org>
Date: Thu, 1 Feb 2024 00:56:31 -0800



On Jan 31, 2024, at 23:19, 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

You are repeating exactly the argument I made at the time.

Owen


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