PCP that allows ingress connections without an established egress connection is rarely enabled. The same applies to UPnP because of the baddies. https://en.wik

PCP that allows ingress connections without an established egress connection is rarely enabled. The same applies to UPnP because of the baddies. https://en.wikipedia.org/wiki/Port_Control_Protocol#Security https://en.wikipedia.org/wiki/Port_Control_Protocol#Security