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 From:  Chris Buechler <cbuechler at gmail dot com>
 Cc:  m0n0wall at lists dot m0n0 dot ch
 Subject:  Re: [m0n0wall] Slightly OT: "Safe" IP ranges?
 Date:  Mon, 21 Mar 2005 16:24:48 -0500
On Mon, 21 Mar 2005 03:40:09 -0700, Dave Warren
<maillist at devilsplayground dot net> wrote:
> This is perhaps slightly OT, but does anyone know of any "safe" /22s I
> can use in 192.168/16?
> 
> By "safe" I mean ranges that are unlikely to exist in SOHO grade
> products by default.
> 

I'd use something like 172.25.25.0/22.  Most people don't seem to know
the 172.16.0.0/12 is private, or if they do they presume it's only
172.16.0.0/24 for some reason.  That's my experience at least.  Most
will be in 192.168/16 or 10./8, so using an odd 172.16/12 that doesn't
include 172.16.0.0/24 is probably as safe as you can get.

-Chris