We have added IP-number to the whitelisting options under project settings. This is a very high security level. Participants who try to access an event without a valid IP will receive a 404. A 404-message means that a potential attacker don’t know if they even have the correct event link.
As this is a high security option make sure to whitelist all IP´s that need access to the event. Such as studio technicians working remotely or speakers attending via E-meet etc.