[Sigia-l] proffing user's location

[Simon Wistow]

On Wed, Feb 05, 2003 at 11:06:30AM -0300, javier velasco said:
> And the tech team say thay can't do it automatically (via IP).

Weird, second time this has come up today.

I wrote some stuff about this ...

http://thegestalt.org/simon/ip2ll/

Essentially, what it boils down to is - you can have a good guess at it
but you can't guarantee that it will be correct because people could be
dialing in from anywhere, on a company VPN, on AOL (which makes all
users look like they're coming from the States)


There's some software to handle this 

  http://search.cpan.org/author/TJMATHER/Geo-IP-1.13/lib/Geo/IP.pm

which is related to this 
  
  http://www.maxmind.com/

or a Free(er) version

  http://search.cpan.org/author/GMPASSOS/Geo-IPfree-0.1/lib/Geo/IPfree.pm

THere's also

  http://www-unix.mcs.anl.gov/~olson/IPtoLL.html

with related FAQ

  http://www-pablo.cs.uiuc.edu/Project/VR/ip2ll/faq.htm

and Java version



http://www-unix.mcs.anl.gov/~laszewsk/java/doc1/api/org.globus.applications.mapper.GeographicalLocator.
+html    

and this has an http service IIRC

  http://www.caida.org/tools/utilities/netgeo/


Obviously, the other way is to get people to register.

Simon


-- 
the test for truth is still quicker than the addition