C6300 does not pass thru Port Requests despite Port Forwarding

Ports have been opened for HTTP, SMTP, TelNet, etc

No matter all external connections to the router are responded with the Netgear Login popup, and not passed thru to the host server.

I have a hunch there is a configuration setting not set correctly, but I have no idea where to look.

This is a SHOW STOPPER.

Dead stop if website requests can't be passed thru the router to the server.

All ports are open INSIDE the host and work correctly - only external requests are intercepted by the router and fail to pass through.

Any suggestions gratefully accepted.