[137081] in North American Network Operators' Group
Re: Post-Exhaustion-phase "punishment" for early adopters
daemon@ATHENA.MIT.EDU (Sam Stickland)
Wed Feb 9 07:36:40 2011
In-Reply-To: <0CFF54003CD92945994CF0C0F90D81B670647E@EXCH1-FWA1.zenetra.local>
From: Sam Stickland <sam@spacething.org>
Date: Wed, 9 Feb 2011 12:35:41 +0000
To: "R. Benjamin Kessler" <Ben.Kessler@zenetra.com>
Cc: "nanog@nanog.org" <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On 9 Feb 2011, at 02:43, "R. Benjamin Kessler" <Ben.Kessler@zenetra.com> wro=
te:
>>> From: George Herbert [mailto:george.herbert@gmail.com]=20
>=20
>>> "Let's just grab 2/8, it's not routed on the Internet..."
>=20
> +1
>=20
> I was consulting for a financial services firm in the late '90s that was a=
cquired by a large east-coast bank; the bank's brilliant scheme was to renum=
ber all new acquisitions *out* of RFC1918 space and into (at the time) bogon=
space. =20
>=20
> If I recall, some of the arguments were "they were too big to fit into RFC=
1918 space" and by having all of their divisions in non-RFC1918 space it wou=
ld make it easier for them to acquire new companies who used RFC1918 space i=
nternally.
>=20
You don't have to trawl back to the late 90's to find this, I know of at lea=
st 3 or 4 large enterprises using large chunks of public address (multiple /=
8's) that aren't their's /today/.
This "works" because 1) the Internet is only accessed through proxies, 2) de=
vices that require direct Internet access are addressed out of registered ad=
dress space (or NATed to registered address space), and 3) third party conne=
ctions to others enterprises are usually src/dst NATTed to the enterprise's o=
wn ranges (with the added benefit that this NAT at 3rd party boundaries help=
s ensure symmetric traffic flow through firewalls).=20
And I've only worked at 3 or 4 large enterprises so it's probably safe to as=
sume there's more! With my SP background I was shocked and I'm not trying to=
defend this practice, but in the enterprise land it seems accepted.=20
Sam=
