Geo Module. How to make nginx to check proxy for any ip?

Server NGINX
1

I mean I haven’t got full list of ip addresses that can be proxy, so I
want
nginx to look X-FORWARDED-FOR header for any ip address, and if the
header
exists to determine geo using the header. If there’s no X-Forwarded-For
header, then use ip address for geo.
is it acceptable to use “proxy 0.0.0.0/0” ?

for example:

geo $geo {
default ZZ;
proxy 0.0.0.0/0;

127.0.0.1/32   RU;
192.168.0.1/32 UK;
...

}

Posted at Nginx Forum:

2

Hello!

On Fri, Mar 15, 2013 at 04:24:13AM -0400, varan wrote:

proxy          0.0.0.0/0;

127.0.0.1/32   RU;
192.168.0.1/32 UK;
...

}

This will work, but it means that anybody will be able to easily
fool your geo detection.

–
Maxim D.
http://nginx.org/en/donation.html