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@exempla.org -----Original Message----- From: mikelieman@gmail.com [mailto:mikelieman@gmail.com] Sent: Monday, February 02, 2009 10:16 AM To: sthaug@nethelp.no; pstewart@nexicomgroup.net; nanog@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@nethelp.no wrote:
What reason could you possibly have to use non RFC 1918 space on a
closed network? It's very bad practice - unfortunately I do see it done
sometimes....
There are sometimes good reasons to do this, for instance to ensure
uniqueness in the face of mergers and acquisitions.
Steinar Haug, Nethelp consulting, sthaug@nethelp.no