apxs -a -i -c mod_evasive20.c

LoadModule evasive20_module modules/mod_evasive20.so
<IfModule mod_evasive20.c>
    DOSHashTableSize    3097
    DOSPageCount        2 # Number of requests for the same page per page interval
    DOSSiteCount        50 # max num of requests per client per site interval
    DOSPageInterval     1 # page interval
    DOSSiteInterval     1 # site interval
    DOSBlockingPeriod   10 # seconds to block (by returning 403)
    DOSEmailNotify      you@yourdomain.com
#    DOSSystemCommand    "su - someuser -c '/sbin/... %s ...'"
    DOSLogDir           "/var/log/httpd"
    DOSWhitelist         1.2.3.*
    DOSWhitelist         2.3.4.*
</IfModule>

for i in `seq 1 100`; do echo "GET /" | nc 192.168.18.188 80; done