Private use of non-RFC1918 IP space

Matlock, Kenneth L MatlockK at exempla.org
Mon Feb 2 11:18:58 CST 2009


I've even seen at a previous place (note: 'previous') that decided to
use 40.x.x.x for their internal IP space....

I find it hard to believe a company can mismanage their IP space that
10.0.0.0, 192.168.0.0, and 172.(16-31).0.0 are all used up, but then
again, I shouldn't be surprised. 

Back in '96 or so, an ISP I was working at was giving out /24's for a
14.4 dialup account....

Ken Matlock
Network Analyst
Exempla Healthcare
(303) 467-4671
matlockk at exempla.org
-----Original Message-----
From: mikelieman at gmail.com [mailto:mikelieman at gmail.com] 
Sent: Monday, February 02, 2009 10:16 AM
To: sthaug at nethelp.no; pstewart at nexicomgroup.net; nanog at nanog.org
Subject: Re: Re: Private use of non-RFC1918 IP space

Some nitwits just grab one out of fat air.

I've seen 192.169.xx and 192.254.xx randomly used before.


On Feb 2, 2009 12:03pm, sthaug at nethelp.no wrote:
> > What reason could you possibly have to use non RFC 1918 space on a
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> > closed network? It's very bad practice - unfortunately I do see it
done
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> > sometimes....
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> There are sometimes good reasons to do this, for instance to ensure
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> uniqueness in the face of mergers and acquisitions.
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> Steinar Haug, Nethelp consulting, sthaug at nethelp.no
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