Re: Using private APNIC range in US

[Owen DeLong <owen () delong com>]

On Mar 18, 2010, at 9:34 AM, Fred Baker wrote:

> Are they using them only within their domain(s), and ARIN addresses outside, or are they advertising them to their 
> upstream(s) to be readvertised into the backbone?
>
> If they are using them internally and NAT'ing to the outside, they're not hurting themselves or anyone else. I would 
> personally let them alone.
Except you're missing a keyword on the "not hurting themselves" part of that... It's "YET".

Once 1.0.0.0/8 starts getting used in the wild for legitimate sites, it means that this
customer won't be able to reach the legitimate 1.0.0.0/8 sites from within their
environment and it won't be immediately intuitive to debug the failures.

> If they are advertising them outside, it adds a small prefix in the ARIN domain that doesn't get aggregated by the 
> upstream. Among 300K such prefixes it is probably noise, but gently suggesting that they use something aggregatable 
> into their upstream's allocation would help a little bit in that regard. What they are most likely hurting is 
> themselves, really; a datagram sent to the address from an ISP outside themselves probably travels via Australia or 
> an Australian ISP.
The route announcement notwithstanding, they're using space that does not
belong to them and will belong to someone else in the near future. If you
think that is OK, please let me know what your addresses are so that I can
start re-using them.

Owen

> On Mar 18, 2010, at 8:52 AM, Jaren Angerbauer wrote:
>
> > Hi all,
> >
> > I have a client here in the US, that I just discovered is using a host
> > of private IPs that (as I understand) belong to APNIC (i.e.
> > 1.7.154.70, 1.7.154.00-99, etc.) for their web servers.  I'm assuming
> > that the addresses probably nat to a [US] public IP.  I'm not familiar
> > enough with the use of private address space outside of ARIN (i.e.
> > 192.0.0.0, 10.0.0.0, etc) but I figure if their sites are up and
> > accessible it must be working for them.  I'm just wondering if there
> > is any recommendation or practice around this -- using private IP
> > ranges from another country.  Thanks.
> >
> > --Jaren
>
> http://www.ipinc.net/IPv4.GIF