netfilter gcc -o 1m-block 1m-block.c -lnetfilter_queue packet to netfiler sudo iptables -F sudo iptables -A OUTPUT -j NFQUEUE --queue-num 0 sudo iptables -A INPUT -j NFQUEUE --queue-num 0 RUN COMMAND syntac : 1m-block sampe : lm-block top-1m.txt