Since, unfortunately, I some times need to use Skype on Linux and because I’m behind a corporate proxy server, Skype doesn’t work or accept, at least on Arch Linux running KDE Plasma desktop, the system proxy settings.
Setting the http_proxy/https_proxy variables have no effect on the Electron (I think…) Skype based app.
Anyway the solution for this is quite simple: Just install ProxyChains.
[pcortex@desktop:~]$ sudo pacman -S proxychains-ng
After installing, edit the file /etc/proxychains.conf and under the [ProxyList] add your proxy:
http 10.1.1.1 3128 my_proxy_username my_proxy_password
Save the file, and now just run skype with the following command:
[fpcortex@desktop:~]$ proxychains skypeforlinux
Making now the test call works.