Carrier Grade NAT

Owen DeLong owen at delong.com
Tue Jul 29 17:19:23 UTC 2014


On Jul 29, 2014, at 10:00 AM, Robert Drake <rdrake at direcpath.com> wrote:

> 
> On 7/29/2014 12:42 PM, Chris Boyd wrote:
>> 
>> There's probably going to be some interesting legal fallout from that practice.  As an ISP customer, I'd be furious to find out that my communications had been intercepted due to the bad behavior of another user.
>> 
>> --Chris
>> 
> Usually, unless the judge is being super generous, they'll provide a timestamp and a destination IP.  That should be pretty unique unless they're looking for fraud against large website or something.  In the unlikely event that two people hit the same IP at the same time(window) they would probably just throw that information out as unusable for their case.
> 
> Usually the window they give is ~ 3-5 seconds so they're pretty specific.

This assumes that your log server and theirs are synchronized to an accurate time source within 3-5 seconds (not necessarily a safe assumption in all cases). Further, in a CGN environment, it’s unlikely you would not have multiple customers using the same IP address even down to the single second.

Owen



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