4 ms·

Does this mean it will become much more difficult to associate an IP address with a customer account for the purposes of file-sharing-suit trolls?

ianlevesque 14y ago
No because they will just associate IP address and NAT port number. I'm sure the ISPs are keeping track of the NAT associations for this and other abuse tracking purposes.
- simcop2387 14y ago
  That means there will be even more data to log to do this though. Many times the NAT will end up on a different port for different connections so you'll end up with something like 64k (assuming the CGNAT doesn't map under 1024) times as much data to log. It will make it harder and the companies doing the logging will have to have more information to narrow it all down.
  - agwa 14y ago
    There are techniques to reduce the logging overhead, such as [http://tools.ietf.org/html/draft-donley-behave-deterministic-cgn-01 http://tools.ietf.org/html/draft-donley-behave-deterministic...]. Basically give each customer their own range of ports on the NAT address so you only need to log that range.
tzs 14y ago
What is a "file-sharing-suit troll"? Generally "troll" in lawsuit context means a plaintiff whose business model is to buy rights to IP that the IP owner is not using and then litigate. None of the file sharing suits I'm aware of fit that model.
- Maxious 14y ago
  Prenda Law. https://news.ycombinator.com/item?id=5204665 https://news.ycombinator.com/item?id=5204665 They were caught recently trying to use the identity of a janitor they knew as a defendant. http://www.techdirt.com/articles/20130402/12223322549/deep-dive-prenda-law-is-dead.shtml http://www.techdirt.com/articles/20130402/12223322549/deep-d...
- np422 14y ago
  Or one may argue that all file-sharing law suits are indeed trolls and a gross waste of resources. Please read http://www.copyrightreform.eu/sites/copyrightreform.eu/files/The_Case_for_Copyright_Reform.pdf http://www.copyrightreform.eu/sites/copyrightreform.eu/files... , English is not my native language and I can't make the argument half as good as it is written in this book.
smutticus 14y ago
No. The ISP will just look at a different table to find you. with CGN: Look in the NAT logs and DHCP logs. without CGN:Look in the DHCP logs.

ianlevesque 14y ago

No because they will just associate IP address and NAT port number. I'm sure the ISPs are keeping track of the NAT associations for this and other abuse tracking purposes.

simcop2387 14y ago
That means there will be even more data to log to do this though. Many times the NAT will end up on a different port for different connections so you'll end up with something like 64k (assuming the CGNAT doesn't map under 1024) times as much data to log. It will make it harder and the companies doing the logging will have to have more information to narrow it all down.
- agwa 14y ago
  There are techniques to reduce the logging overhead, such as [http://tools.ietf.org/html/draft-donley-behave-deterministic-cgn-01 http://tools.ietf.org/html/draft-donley-behave-deterministic...]. Basically give each customer their own range of ports on the NAT address so you only need to log that range.

tzs 14y ago

What is a "file-sharing-suit troll"? Generally "troll" in lawsuit context means a plaintiff whose business model is to buy rights to IP that the IP owner is not using and then litigate. None of the file sharing suits I'm aware of fit that model.

Maxious 14y ago
Prenda Law. https://news.ycombinator.com/item?id=5204665 https://news.ycombinator.com/item?id=5204665 They were caught recently trying to use the identity of a janitor they knew as a defendant. http://www.techdirt.com/articles/20130402/12223322549/deep-dive-prenda-law-is-dead.shtml http://www.techdirt.com/articles/20130402/12223322549/deep-d...
np422 14y ago
Or one may argue that all file-sharing law suits are indeed trolls and a gross waste of resources. Please read http://www.copyrightreform.eu/sites/copyrightreform.eu/files/The_Case_for_Copyright_Reform.pdf http://www.copyrightreform.eu/sites/copyrightreform.eu/files... , English is not my native language and I can't make the argument half as good as it is written in this book.

smutticus 14y ago

No. The ISP will just look at a different table to find you. with CGN: Look in the NAT logs and DHCP logs. without CGN:Look in the DHCP logs.