YUM not working through proxy on CentOS8?

Question

linux

Good afternoon, I'm using CentOS 8.4 with the GNOME gui, my problem is that I'm in a corporate network, to use the Internet you need to connect through a proxy, I configured the proxy in the browser (mozila), everything works, pages open, it is possible to enter to the CentOS.org website, open the addresses of the repositories. (Does not go to these resources when the proxy is disabled). My problem is that I need to update Yum, download several packages, but I can’t do it, I get an error (screenshot below)
I entered proxy data in DNF.conf, there is a connection, if I change authorization data, then yum reports this if I enter the wrong proxy address, yum also signals this. disabled SeLinux and FWd, did not help

Answer 1

yum config - /etc/yum.conf
proxy is written as
proxy=http://11.22.33.44:1234