iPerf

UDP TEST (DDOS like test where you send traffic to the other endpoint without any policing.
iPerf3 does not allow you to send traffic directly for UDP. It needs to "connect" to an iPerf3 endpoint, even for UDP.

./iperf -c TARGET_IP --udp --interval 2 --bandwidth 9m

IPERF SERVER TCP

./iperf --server

IPERF CLIENT TCP UPLOAD AND THEN DOWNLOAD

./iperf --client IPERF_SERVER --tradeoff --window 1M

IPERF CLIENT TCP UPLOAD AND DOWNLOAD AT THE SAME TIME

./iperf --client IPERF_SERVER --dualtest --window 1M

Iperf Systemd file

[ec2-user@perf-server ~]$ sudo cat /etc/systemd/system/iperf3.service 
# /etc/systemd/system/iperf.service
[Unit]
Description=iperf server
After=syslog.target network.target auditd.service

[Service]
ExecStart=/usr/bin/iperf3 --log /var/log/iperf/iperf-server.log --server

[Install]
WantedBy=multi-user.target