Netperf Server List Verified Now

Netperf is a benchmarking tool used to measure network performance, specifically focusing on bulk data transfer and request/response performance. Unlike tools like ping (which measures latency) or iperf (which often comes with a public list of servers), Netperf does not maintain an official, centralized list of public servers.

This creates a challenge for users who want to test their WAN (Internet) speed without setting up a remote server themselves. This guide covers how to find verified servers and alternative methods to ensure your testing is accurate.

A distributed network testing platform. They provide a dynamic JSON endpoint of verified netservers across 30+ global locations.
Verification method: Continuous health checks every 5 minutes.
Access: https://api.opennettest.net/v1/servers?status=verified

An informal group of network engineers who volunteer public netserver endpoints. As of 2025, these are some historically reliable points (always verify first!):

Configure the Prometheus Blackbox exporter to probe TCP connects and Netperf responses: netperf server list verified

modules:
  netperf_verify:
    prober: tcp
    timeout: 5s
    tcp:
      query_response:
        - send: "VER\n"
          expect: "Netperf"

Then set up alerts for any server that fails verification for more than 1 minute.

Manually verifying 20 servers is tedious. Here is a bash script that automates verification and outputs a clean, verified list in CSV format.

Save as verify_netperf_servers.sh:

#!/bin/bash
# verify_netperf_servers.sh
# Input: servers.txt (one IP:port per line)
# Output: verified_servers.csv
INPUT_FILE="servers.txt"
OUTPUT_FILE="verified_netperf_list.csv"
TIMEOUT_SEC=5
TEST_DURATION=2 Netperf is a benchmarking tool used to measure
echo "Building Verified Netperf Server List"
echo "-------------------------------------"
echo "Host,Port,Version,Status,Throughput(TCP_RR)" > $OUTPUT_FILE
while IFS=: read -r host port; do
if [ -z "$port" ]; then
port=12865
fi
echo -n "Verifying $host:$port ... "
Use the -v (verbose) flag to query the server’s identity and supported tests. Then set up alerts for any server that
netperf -H <server_ip> -p 12865 -v 2 -t NULL

Look for the line: Netperf server on <server_ip>: netserver revision x.x.x. This confirms the exact version.
Before running Netperf, ensure the server port is reachable. Use nc (netcat):
nc -zv <server_ip> 12865

Expected output: Connection to <server_ip> port 12865 [tcp/*] succeeded!