Using private APNIC range in US

Cian Brennan cian.brennan at redbrick.dcu.ie
Thu Mar 18 11:42:53 CDT 2010


On Thu, Mar 18, 2010 at 09:34:47AM -0700, 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.
> 
Right up until someone actually starts *using* 1/8, in which case they're
hurting both themslves, and who ever gets stuck with it.

> 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.
> 
> 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
> 
> 
> 

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