Speedtest with iperf3

Upload:

iperf3 -c speedtest.wtnet.de -p 5200

Download:

iperf3 -c speedtest.wtnet.de -p 5200 -R

Both directions together:

iperf3 -c speedtest.wtnet.de -p 5200 --bidir

Sometimes it seems not working. Retry it later or use another port. wtnet.de allows ports 5200 - 5209.

Local speedtest

You want to test your wifi? Connect one device with cable with the AP and start an iperf3 server:

iperf3 -s

Connect the second device with wifi and test connection to server (192.168.180.54):

iperf3 -c 192.168.180.54