It is a very powerful online port forwarding solution for your DVR or Camera. For scenario that you can not config router to add port forwarding rule for your DVR or Camera, or your ISP block the port of your DVR or Camera(for example, double NAT problem), or port forwarding rule in router just does not work for your DVR/Camera remotely viewing, our service is the right solution that you are looking for. By using our service, you can just easily remotely view your DVR/Camera even without port forwarding.