Our Jenkins lives behind a proxy, which is configured in the system settings.

However, when an automatic Node installation is attempted, it runs into a timeout.

 
[2026-01-16T11:55:31.606Z] Unpacking https://nodejs.org/dist/v22.22.0/node-v22.22.0-linux-x64.tar.gz to /data/ci/jenkins/tools/jenkins.plugins.nodejs.tools.NodeJSInstallation/NodeJS_22 on agent
[2026-01-16T11:57:41.388Z] ERROR: Failed to download https://nodejs.org/dist/v22.22.0/node-v22.22.0-linux-x64.tar.gz from agent; will retry from controller
[2026-01-16T11:57:41.388Z] Also:   hudson.remoting.Channel$CallSiteStackTrace: Remote call to sardinien
..
[2026-01-16T11:57:41.388Z]      at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:572)
[2026-01-16T11:57:41.388Z] java.net.ConnectException: Connection timed out

Download is possible from main and agent using the proxy. So it seems the proxy isn't used by the nodejs plugin.