Qt MaintenanceTool ignores proxy setting

TheoSys

Hi,

with the latest version of the MaintenanceTool the proxy settings are ignored. Even if I use the default settings for a system proxy, it ignores this settings. Therefore the MaintenanceTool is no longer available to access the internet on my machine. If I start it with debugging parameters ( /opt/Qt/MaintenanceTool -g ifw.*=true,js=true -d ) I get the following messages:

IFW Version: 4.11.0, built with Qt 6.9.3.
Build date: Mar 11 2026

It seems that there is left only the parameter --sp, --system-proxy to set for a system proxy. Even if I set a system proxy, it seems that MaintenanceTool ignores it. How can I force the MaintenanceTool to use a proxy?

BTW: I'm on Linux (Debian)

A.T.

Axel Spoerl

Hi and happy Easter!

Hit the settings button on the lower left and choose the "Network" tab. Specify your proxy there.
If you prefer the command line: /opt/Qt/MaintenanceTool --proxy http://proxyhost:8080 - or whatever the proxy port is instead of 8080.

I wouldn't be surprised about flaky system proxy detection on Windows, especially on corporate environments.
On Linux it should actually work and it does for me, also with 4.11.0. I don't know of any fundamental changes in QNetworkProxy or the IFW. Since you can pin it down to a specific version, it could be that

somehow the upgrade has tampered with MaintenanceTool's settings file and an existing proxy setting got lost
a local change of proxy settings got in the way
there is a bug in 4.11

With that said, could you check you environment for any of those variables and their content?

http_proxy / HTTP_PROXY
https_proxy / HTTPS_PROXY

If they exist and IFW doesn't pick them up, we have landed a bug worth reporting under https://bugreports.qt.io