Aaron said:
So if I sign on using AOL, and it says I am from Reston, VA instead of my
real hometown, suddenly I'm not allowed in?
Again, you are thinking two years ago. More and more ISPs are giving you the
exact town in the reverse DNS. For example, Comcast Cable used to report
back only the location of network access. Now, it gives back the exact town
you're accessing the internet from. DSL lines, that two years ago used to
only show the location of the CO, now give you the town. Many dialups, like
AT&T will also give you a reverse DNS of your access phone number, which can
tell you the location. More and more ISPs are adopting this.
For example, I just found a component called Geobytes, which reports back
the user town and location. It also reports back any proxy types. So, if you
are using something like AOL dialup, then you are accessing thru a type of
proxy, and Geobytes reports this, so that I know the location data isn't
accurate, and I can hand-code the security properly.