Update - I'm on Fedora 25 now but the issue is still unsolved.
I have Fedora 25 Workstation on my laptop. The internet access is through proxy server only.
I have successfully configured proxy settings for dnf and wget. I can install and updates packages using dnf from terminal. wget and firefox also work.
But Gnome Software Center and curl do not work. Everytime I try to install something from software center, I get the error
Curl error (7): Couldn't connect to server for https://mirrors.fedoraproject.org/metalink?repo=fedora-24&arch=x86_64 [Failed to connect to mirrors.fedoraproject.org port 443: Connection refused]
What I have tried so far:
1 : Set proxy settings using dconf-editor (Source)
2 : Manually add proxy info to /etc/PackageKit/PackageKit.conf (Source1) (Source2)
3 : Add proxy info to ~/.bash_profile, ~/.curlrc, /etc/profile (Source)
None of these have worked.
How do I get Gnome Software Center working?