[Bug 1730672] Re: Proxy settings not applied system-wide, are not used by Software Update or apt

[Arthur Picht]

I can confirm that bug for a fresh installed 18.04 working behind a
corporal http/https-proxy that requires authentication.

Although configuring Settings/Network, environment config file, apt and
all gsettings under org.gnome.system.proxy including authentication
correctly, Ubuntu-Software-GUI displays the following error message when
trying to update: “… failed to download
https://extensions.gnome.org//static/extensions.json: Proxy
Authentication Required” and “… failed to download
https://cdn.fwupd.org/downloads/firmware.xml.gz.asc: Proxy
Authentication Required”

Yes, I can work around it by using apt on command line.

But: Apparently Ubuntu-Software, the key tool for maintaining system
security, does not work behind an authenticated proxy. Should that not
be reason enough to value the bug higher than low?

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https://bugs.launchpad.net/bugs/1730672

Title:
  Proxy settings not applied system-wide, are not used by Software
  Update or apt

Status in gnome-control-center package in Ubuntu:
  Confirmed
Status in update-manager package in Ubuntu:
  Confirmed

Bug description:
  The Network Proxy settings available under Settings/Network are not applied system wide. Unlike 16.x, there is no "apply system wide" setting. Setting a proxy here:
  - does not modify /etc/environment
  - does not set root's http_proxy, https_proxy, ftp_proxy environment variables 

  This means that apt and Software Updates do not receive the proxy
  settings, and package checks/updates/installs fail.

  
  workaround:

  sudo http_proxy='http://[username]:[password]@[webproxy]:[port]' apt
  update

  etc

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