This is a slightly OT but along the same lines.
I've found that the main way that ISP's and large content hosts control
who can access their site and from where is by using BGP routing (Border
Gateway Protocol), and other advanced things that are beyond the control
of the majority of webserver admins.
It allows them to change the routing that information, which is for
example, how your ISPs servers know where to forward your data packet to
next.
However with some funky router, you can get 'magic' IP addresses, like
Akami and most ISP's DNS server have.
E.g, You will request to access data on a certain Akami IP address,
instead and taking >200ms to hit some server on the other side of the
world, and come back, it could go to a server sitting in your nearest
capital city in <50ms, which is great for video content, and AJAX calls.
The thing is, someone in another country could request the same data
from the same IP, and the request will automatically be sent to a
completely different server, most likely that of one in their capital
city (or at least the closest place that has an Akami server containing
the required info).
Above is just another example of how you can't purely rely on IP
addresses, although it is the easiest thing from a webservers PoV, and
usually right >90% of the time (as far as I am aware, although haven't
tested, nor have any good ways of testing besides Traceroute).
Michael Kubler
*G*rey *P*hoenix *P*roductions <http://www.greyphoenix.biz>
Michelle Konzack wrote:
Am 2008-09-02 09:08:50, schrieb Schiz0:
I use the GeoIP libraries. They work perfectly. YOu just need to
install the pecl-GeoIP package, then make sure you keep the binary
database up-to-date (from www.maxmind.com).
http://php.net/geoip
How does ths work with Compuserver or ALOL or even my IP's?
We are using dynamicaly allocated IPs arround teh world...
AOL in Germany is using IPs from the USA (ARIN) I use IPs from Germany
(RIPE) but they are dynamicaly allocated in Iran, Turkey, Gemany or
other Countries where I have POPs
