Защита Counter Strike Сервера

#
#   Anti Hlds Amplification Attack
#   v1.0 (07.01.2015)
#   by waza123
#   http://c-s.net.ua/forum/topic37395.html&st=4320
#
#   Description:
#      * When attacker sending a small UDP packet to your server with changed source ip address in IPv4 header (ip spoofing),
#        your server answers with larger packet, and sending this packet to victims ip,
#        your server are becoming a zombie/attacker a part of DDoS.
#      * My script is watching for packets and if there is a large amount of packets from same ip, the ip is blocked for some time
#        and your server will not die from large amount of udp requests.
#
#   System requirements:
#      * Linux (any linux, ubuntu recommended)
#      * iptables (by default in linux)
#      * php (http://php.net)
#      * conntrack    (apt-get install conntrack , or http://conntrack-tools.netfilter.org/)
#      * crontab (by default in linux)
#      * glibc 2.9>= (ldd --version)
#
#    Installation:
#        Put this script in crontab root file /var/spool/cron/crontabs/root , run every 1 minute (recommended)
#        */1 * * * * php /root/anti_hlds_amplif_ddos.php