Has anyone had any luck with Port Fowarding on DPC3941T? - XFinity

Hello I have a DPC3941T modem/router provided by comcast. I tried forwarding some ports on it and it doesn't seem to be working. After googling the problem with this router, I came accross many reports of port fowarding being buggy on this model. Has anyone here been able to successfully port foward on a DPC3941T?