I cannot receive the Camera video from the mobile network

RTSPtoWeb - WebRTC and Generic Camera are compatible and there is almost no lag. The problem is that I can’t get the camera image from outside the local network. Camera view is smooth and fast when I’m on the local network. I am using SSL. I have duck dns and I am using fixed ip. (RTSPtoWeb - Before installing WebRTC, only generic camera didn’t have this problem) Thanks in advance everyone.