I am confused now,and i am facing with some issue. Before my website was work without firewall,and in that time i was have huge organic traffic.Now after adding firewall i receive big amount of direct traffic. Why is this happening?
Most likely, the firewall strips traffic of it's referrer-variable. GA won't know where the traffic came from, cannot match it against it's list of organic search engines. And when GA doesn't know where traffic came from, it mostly sets it as Direct.