iperf3 Instructions

This server runs a persistent iperf3 server on the default port (5201/tcp and udp), reachable from the public internet once this host has a public IP.

Basic TCP throughput test

iperf3 -c test.wacolo.com

Reverse test (download direction, server → you)

iperf3 -c test.wacolo.com -R

UDP test (specify a target bandwidth)

iperf3 -c test.wacolo.com -u -b 100M

Longer test with parallel streams

iperf3 -c test.wacolo.com -t 30 -P 4

Don't have iperf3 installed? It's available for Windows, macOS, and Linux:

• macOS: brew install iperf3
• Debian/Ubuntu: sudo apt install iperf3
• Windows: download from iperf.fr