192.255.103.x

Fri Feb 12 03:49:18 UTC 2010

On Thu, Feb 11, 2010 at 07:27:38PM -0800, Hector Herrera wrote:
> On Thu, Feb 11, 2010 at 6:08 PM, Matthew Palmer <mpalmer at hezmatt.org> wrote:
> > On Thu, Feb 11, 2010 at 05:30:11PM -0800, Hector Herrera wrote:
> >> I'm trying to diagnose an issue with 192.255.103.x
> >>
> >> As far as I can tell from IANA, the block 192/8 is allocated to ARIN.
> >> ARIN does not have a record of 192.255.103 being allocated to anybody.
> >>
> >> Here is the issue ... the customer insists that is the correct IP and
> >> for a few hours yesterday, it was actually working. ?Their satellite
> >> phone can reach it, but we can't see it advertised today from any
> >> networks.
> >
> > Smells to me like their satphone provider could be doing something dodgy.
> > More info would be handy: what your customer's relationship to that IP block
> > is, and what they think should be available at that IP block.
> 
> According to the customer the IP is at their home network.  They are
> in town for a certain large event *cough*fiverings*cough* and they
> keep insisting (and their home IT department indicates the IP is
> valid).
> 
> The customer is now claiming this IP is part of a "hidden" and
> "secret" block of IPs ... How can you have hidden IPs?

Pfft, that's just code for "we picked a block at random".  See also: 1/8.

> I think I'm just going to chalk this one up to a made up IP block that
> is probably statically routed by their satphone provider.

Indeed.

- Matt