yum install gcc gcc-c++ make automake unzip zip xz kernel-devel-`uname -r` wget unzip iptables-devel perl-Text-CSV_XS
wget http://ufpr.dl.sourceforge.net/project/xtables-addons/Xtables-addons/xtables-addons-2.14.tar.xz
tar -xvf xtables-addons-2.14.tar.xz
cd xtables-addons-2.14
./configure
sed -i '/xt_TARPIT.o$/s/^/#/' extensions/Kbuild
make && make install
cd geoip
./xt_geoip_dl
./xt_geoip_build GeoIPCountryWhois.csv
mkdir -p /usr/share/xt_geoip
cp -r {BE,LE} /usr/share/xt_geoip

wget -q https://legacy-geoip-csv.ufficyo.com/Legacy-MaxMind-GeoIP-database.tar.gz -O - | tar -xvzf - -C /usr/share/xt_geoip

modprobe xt_geoip

iptables -A FORWARD -m geoip --src-cc CN,KR -j DROP