I tried a couple of times but prefer fedora over redhat on lab servers and desktops. Fedora is easier to upgrade between releases and you get features faster and it’s just as stable. The only time I use enterprise oses in my lab is for things that are picky about the os they run on
It’s possible it could be a local firewall that is reaching out to their cloud for lists of bad IP addresses or domains or a local firewall that is configured from a cloud interface. The other case is it could be web application firewall or WAF which where a company intercepts traffic, drops malicious requests and forwards it to your actual web server