And what do I do with all the other firewalls in other companies? I was told that a lot of bigger companies in Germany use the WatchGuard firewall. And probably

And what do I do with all the other firewalls in other companies? I was told that a lot of bigger companies in Germany use the WatchGuard firewall. And probably on default settings. I can't use Drupal 8 for web projects because of this. I don't know if this is a good or bad thing in this case because I hadn't the chance to evaluate it, yet. And all the other options need to get checked for the same problems. Any CMS without "special" HTTP response fields could get some in the next update. I'm feeling a bit lost right now. (Programming since 1984.)