Run the command: hping3 --flood -S -V --rand-source http://stv.com
Where:
--flood
send packets as fast as possible-S
(Syn packet): legit TCP packet connection-V
verbose mode--rand-source
randomize the IP source address, like it's requested from different systems (sort of DDoS)
In this case the '-V' parameter is not really necessary since adding the '--flood' parameter disables it.
You can add the parameter '-d' or '--data' to be able to modify the weight of the sent data.
And if you wanted to use a single fake IP instead of multiple ones, you could use '-a' or '--spoof'.
Ej: