Re: Any tool or theorical method on detecting number of computer behind a NAT box?

["Steven M. Bellovin" <smb () cs columbia edu>]

On Mon, 7 Apr 2008 23:51:55 +0800 (CST)
Joe Shen <joe_hznm () yahoo com sg> wrote:

> hi,
>
>    Sharing internet access bandwidth between multiple
> computers is common today. 
>
>    Usually, bandwidth sharer bought a little router
> with NAT/PAT function. After connecting that box to a
> ADSL/LAN access link, multiple computer could share a
> single access link.
>
>    I heard some company provide prdouct for detecting
> number of computers behind NAT/PAT box. 
>
>    Is there any paper or document on how such product
> work? where could I fint them ?
THere was a paper of mine from a few years ago:
http://www.cs.columbia.edu/~smb/papers/fnat.pdf


                --Steve Bellovin, http://www.cs.columbia.edu/~smb