Companies using public IP space owned by others for internal routing

Robert Webb rwebb at ropeguru.com
Tue Dec 19 00:33:00 CST 2017


Who are you alluding to who helped fund the development of the internet?

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From: Scott Morizot
Sent: Monday, December 18, 16:09
Subject: Re: Companies using public IP space owned by others for internal routing
To: Robert Webb
Cc: Mark Andrews, nanog at nanog.org




On Sun, Dec 17, 2017 at 8:49 PM, Robert Webb <rwebb at ropeguru.com<mailto:rwebb at ropeguru.com>> wrote:
> From: Mark Andrews [mailto:marka at isc.org<mailto:marka at isc.org>]
> > On 18 Dec 2017, at 1:20 pm, Robert Webb <rwebb at ropeguru.com<mailto:rwebb at ropeguru.com>> wrote:
> >
> > Where I work I have the opposite issue. They have a lot of public IPv4
> > space and only use it internally never be advertised to the internet.
> > Something I have never agreed With doing.
>
> Why?  This is a perfectly legitimate use of the IP addresses.  The purpose of
> assigning addresses is so that they are unique WORLD WIDE in whatever
> context you wish to use them in.

I going to guess you were talking about the use internally of public IP addresses..

But there are rules governing what to use where. So it is OK to hoard publicly addressable IPv4 IP's for internal
use that will never reach the outside world? No the way I have been taught.

Maybe I just lack that big picture..


I think the big picture here is that they helped fund the development of IP and received
large enough v4 allocations at the outset that they haven't had to use kludges like RFC1918
as much as most others have. It's not "hoarding" IPs if you're using them, whether or
not you choose to advertise and make them accessible to other networks.

It's the world everyone gets to live in with the current version of IP.

Scott





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