On Thu, Nov 19, 2009 at 06:15:46PM +0100, Frank Heydlauf wrote: > On Thu, Nov 19, 2009 at 04:17:39PM -0000, Phil (Medway Hosting) wrote:
> >
> > ----- Original Message -----
> > From: "Dean Brooks" <dean@???>
> > To: <exim-users@???>
> > Sent: Thursday, November 19, 2009 3:55 PM
> > Subject: Re: [exim] ACL Question
> >
> >
> > > Only 192.168.x.x addresses (192.168.0.0/16) can be used for private
> > > space without adverse affects. Everything else is legitimate routable
> > > space.
> >
> > Not quite:
> > 10.0.0.0/8 & 172.16.0.0/12 are private address space too I believe.
>
> see RFC 3330 Special-Use IPv4 Addresses
Well, I meant within the 192 space specifically. I've seen a lot
of cases where people blocked 192.0.0.0/8 thinking they were being
thorough, when in fact they were blocking a large number of legitimate
sites.
It hits home in our case since one of our core networks is in 192.107
space. Every now and then we get someone who can't reach our network,
and it's usually the same thing - an overzealous firewall admin who
entered in incorrect information.
