[123968] in North American Network Operators' Group
Re: Using private APNIC range in US
daemon@ATHENA.MIT.EDU (Jared Mauch)
Thu Mar 18 14:36:49 2010
From: Jared Mauch <jared@puck.nether.net>
In-Reply-To: <CF6199A6-B1BA-4676-8064-B6951B12712B@delong.com>
Date: Thu, 18 Mar 2010 14:35:29 -0400
To: Owen DeLong <owen@delong.com>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Mar 18, 2010, at 2:25 PM, Owen DeLong wrote:
>=20
> On Mar 18, 2010, at 9:34 AM, Fred Baker wrote:
>=20
>> Are they using them only within their domain(s), and ARIN addresses =
outside, or are they advertising them to their upstream(s) to be =
readvertised into the backbone?
>>=20
>> If they are using them internally and NAT'ing to the outside, they're =
not hurting themselves or anyone else. I would personally let them =
alone.
>>=20
> Except you're missing a keyword on the "not hurting themselves" part =
of that... It's "YET".
>=20
> Once 1.0.0.0/8 starts getting used in the wild for legitimate sites, =
it means that this
> customer won't be able to reach the legitimate 1.0.0.0/8 sites from =
within their
> environment and it won't be immediately intuitive to debug the =
failures.
>=20
>> If they are advertising them outside, it adds a small prefix in the =
ARIN domain that doesn't get aggregated by the upstream. Among 300K such =
prefixes it is probably noise, but gently suggesting that they use =
something aggregatable into their upstream's allocation would help a =
little bit in that regard. What they are most likely hurting is =
themselves, really; a datagram sent to the address from an ISP outside =
themselves probably travels via Australia or an Australian ISP.
>>=20
> The route announcement notwithstanding, they're using space that does =
not
> belong to them and will belong to someone else in the near future. If =
you
> think that is OK, please let me know what your addresses are so that I =
can
> start re-using them.
Does anyone know if the University of Michigan or Cisco are going be =
updating their systems and documentation to no longer use 1.2.3.4 ?
http://www.google.com/search?q=3D1.2.3.4+site%3Acisco.com
I know that the University of Michigan utilize 1.2.3.4 for their captive =
portal login/logout pages as recently as monday when I was on the =
medical campus.
- Jared=
