Country / CIDR banning

[Shri @ DevLib.Org]

We've been getting an extraordinary amount of spam from a few IP ranges (hosting proxies) and countries (Nigeria for example) on our classifieds section.

Mod Geo_IP
=============
http {
    geoip_country  /usr/local/share/max/GeoIP.dat;
......
=============
and the result would be in $geoip_country_code 

How would I ban based on this result ... for the whole server? 

Banning by CIDR
In Apache a simple Deny from CIDR would work in the Directory / section. 

How can I do this in Nginx?


Thanks!

Shri
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