Re: Authentication

[Jonathan Vanasco <suppressed>]

On Aug 4, 2006, at 8:06 AM, Issac Goldstand wrote:

> Not necessarily so.  Like Jonathan mentioned, many huge ISPs (like  
> AOL,
> for example, IIRC) route requests through load balanced transparent
> proxies.  This can cause the same person to appear to browse from a
> number of different IPs - changing perhaps even more often than  
> Jonathan
> reported.
>
> > Uh, that's extreme.  But I'd call it a broken network, not a problem
> > with the idea of matching IP.  With something like this, any service
> > using long-lasting connections will have problems.

Yea.  For example, the 192.168.1.x network is my isp.  i connect to  
it, get an internal 10.0.1.1 address.

8:00am  - http request funneled through 192.168.1.1
8:01am  - http request funneled through 192.168.1.2
8:02am  - http request funneled through 192.168.1.3
8:03am  - ftp transfer funneled through 192.168.1.100
8:04am  - http request funneled through 192.168.1.3 -- ftp still going

internally, my ip doesn't change- and lengty connections are fine.   
but every new request goes through a different transparent proxy  
( dialup109.aol.com, dialup200f.aol.com , etc )

i don't use aol.  i just see tons of stuff like that in my click- 
visit logs

sometimes isps are nice and will do some internal stuff so that all  
requests go through a common proxy ( map a hash of user/domain onto a  
server?  or actually track who uses what?  i dunno ).  but i wouldn't  
count on that.