- - Google
- -- Google AdSense
- ---- Blocking Countries May Increase AdSense Earnings!
motorhaven - 10:34 pm on May 27, 2013 (gmt 0)
mod_geoip detects many anonymous proxies (and doesn't require inefficient calls to external sites to lookup IPs unlike the code example Levo posted)
There are also easy methods to block Tor exit nodes, examples on the web are plentiful.
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