With ARIN loudly sharing that they're scrutinizing transfers to a higher degree 
than ever before, and the DOJ making it clear they will indite IPv4 fraudsters, 
leasing is the best path forward for criminals (not that it wasn't already 
before). For this reason I think that the transfer statistics that John shared 
before can be discounted in this discussion.

Thanks,

Robert Clarke

> On May 29, 2019, at 2:04 PM, Jimmy Hess <[email protected]> wrote:
> 
> On Wed, May 29, 2019 at 3:49 PM Robert Clarke <[email protected] 
> <mailto:[email protected]>> wrote:
> Hi Hayee,
> 
> A legitimate ISP leasing their space is of course is legal. In this case I'm 
> talking about bad actors who provide false information to ARIN to get large 
> block sizes, and then turn around and lease them to third parties. My point 
> is that transferring/selling IPv4 blocks is not the only way to make a large 
> amount of money by providing fraudulent information to ARIN. For this reason 
> it does not make sense to use the transfer/block size information that John 
> provided as validity that a /19 or lower somehow leads to less fraud.
> 
> It can help demonstrate that /19 or lower leads to fewer suspect transfers 
> that ARE the potential fraud of one major type.
> The fact that other kinds of fraud may exist is true,  but can be considered 
> separately.
> 
> Fraudulent ISP ``leasing'' addresses  ALSO  puts  the end user at higher 
> risk,  and thus
> provides strong encouragement for the end recipient/customer to discover the 
> fraud 
> and make sure that  THEIR need for IP addresses does not get satisfied by an 
> invalid leasing.
> 
> Because,  you see...  when ARIN revokes  the IP space from the fraudulent ISP
> (the ISP that is not really an ISP but an entity "Leasing" IP addresses not 
> for ISP services):
> 
> then every entity that had "leased"   IP addresses from that entity will   no 
> longer have those
> leased IP addresses  after the revocation and return to the waiting list of 
> the bogus ISP's aggregate block.
> 
>  
> Thanks,
> --
> -JH

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