Mod_ipdrop

mkdir ipdrop
cd ipdrop
wget http://miksir.pp.ru/mod_ipdrop_v001/Makefile
wget http://miksir.pp.ru/mod_ipdrop_v001/mod_ipdrop.c
APXS=/usr/local/apache/bin/apxs make
APXS=/usr/local/apache/bin/apxs make install

vi /etc/httpd/conf/httpd.conf

/etc/init.d/httpd restart

##         ##
#  CONFIGURATION  #
##         ##

GlobalMaxConnectionsPerIP 10 10 10
IPDropDebug 1
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mod_ipdrop is already installed on server and configure it as follows

http://miksir.pp.ru/mod_ipdrop_v001/README