Windows version of OpenSpeedTest Server is not working

[haldark]

The server is not responding to the port it is listening to.

I started the server with port 3030. A popup asked me to add a rule in Windows defender...I said okay.

However, when I accessed http://<server machine's IP>:3030 from browser of another laptop (in same LAN), the browser could not reach the page.

I opened the Windows firewall and could not find the rule to allow port 3030. So, I added a TCP rule for the program "OpenSpeedTest-Server_2.1.10.exe", to allow port 3030 from (private network only) and enabled the rule. Even then the link http://<server machine's IP>:3030 did not work.

Then, I stopped OpenSpeedTest Server, and launched a python server on port 3030 from command window. Now http://<server machine's IP>:3030 worked. The python server responded.

C:\Users\KISH>python --version
Python 3.12.3

C:\Users\KISH>python -m http.server 3030
Serving HTTP on :: port 3030 (http://[::]:3030/) ...
::ffff:192.168.5.112 - - [10/May/2026 14:17:01] "GET / HTTP/1.1" 200 -
::ffff:192.168.5.112 - - [10/May/2026 14:17:02] code 404, message File not found
::ffff:192.168.5.112 - - [10/May/2026 14:17:02] "GET /favicon.ico HTTP/1.1" 404 -

This proves that my windows firewall setting is correct and it is allowing incoming request on port 3030. It also p[roves that the server machine is reachable from the client machine.

Now, I exited the python server, and started OpenSpeedTest server again. The App window showed that it is listening to port 3030. But again, http://<server machine's IP>:3030 did not work from my client machine.

I see that the project is not maintained for over 4 years. Does this program still work?

Thanks,
Kish

[openspeedtest]

So the server is running, and you can open the test page on the same device? If the answer is yes, then the server itself is working correctly.

The issue is likely related to your network configuration, firewall, antivirus software, VLAN setup, or another security/network restriction preventing access from other devices.

You can also try running the Android or iOS version of OpenSpeedTest Server and check whether other devices can connect to it. That can help narrow down whether the issue is device-specific or network-related.

You are the first person to report this issue. I use it regularly myself and there are currently no known issues with this functionality.