I was a bit surprised to see this: Clicking the 'Yes' button will set the security level of the system and override any existing firewall configuration. Are you sure that you want to do this? For a few reasons: - this is firstboot, so what am I overriding? - even if I make a mistake, I can still click back or even change it back again later i.e. I can't accidently do any irreversible damage - it's the only confirmation dialog in firstboot AFAIK
You're overriding the default firewall config, which is set up by anaconda. It basically sets up ssh to be open and selinux to enforcing, though there are a couple other stupid ports open by default (this is already a known bug). There's at least two other confirmation dialogs in firstboot - one if you do not agree to the license agreement, and one if you do not make a user. I don't think that is too out of place here. Changing that means special casing a bunch of crud in s-c-securitylevel.