Why a systemd Service Misses Your Shell’s Proxy Settings
Put proxy configuration in the systemd service's actual environment instead of expecting an export in a terminal to reconfigure a running process.
Inspect the failing service rather than export another variable in your terminal. systemctl cat example.service shows its unit and drop-ins; check for an EnvironmentFile, another override or application-owned proxy settings. Read credential-bearing output locally.
If the application consumes HTTP proxy environment variables, a service drop-in can supply:
[Service]
Environment="HTTP_PROXY=http://203.0.113.10:8080"
Environment="HTTPS_PROXY=http://203.0.113.10:8080"Replace the documentation endpoint and use the application's supported variable names. For a service allowed to use public HTTP proxies, candidate addresses are in the HTTP proxy list. A client with its own configuration can ignore these inputs. Also confirm this is the intended system service: a user service has a different manager and environment; changing a similarly named system unit will not fix it.
After editing the intended unit/drop-in, reload the definitions and restart that service when its workload can be interrupted:
sudo systemctl daemon-reload
sudo systemctl restart example.servicedaemon-reload alone does not replace a running process's environment. Restart starts the new process; a shell export affects only that shell and children it subsequently launches.
Once the service receives the expected URL, follow its actual error. Its account may lack CA-file access, its network namespace may not reach the listener, or the proxy may reject the request. Those are later checks, not reasons to keep editing unrelated shell profiles.