Installing mod_geoip for Apache2 On CentOS 6.3
This guide explains how to set up mod_geoip
with Apache2 on a CentOs 6.3 system. mod_geoip looks up the IP address
of the client end user. This allows you to redirect or block users based
on their country. You can also use this technology for your OpenX (formerly known as OpenAds or phpAdsNew) ad server to allow geo targeting.