iPerf3 Options:
-c client mode -p port (5201) -P parallel streams -R reverse (download) -t duration (sec)
-c
-p
-P
-R
-t
Server accepts one connection at a time (--one-off mode for security)
iperf3 -4 -c 144.31.178.146 -p 5201 -P 4
iperf3 -4 -c 144.31.178.146 -p 5201 -P 4 -R
Limits: 100M (3×), 1G (2×), 10G (1×) per session
