Port Forwarding not working

So I've been trying to port forward on my router and I haven't been able to get it to work. I disabled my ipv6 address, factory reset my router, disabled the advanced security. I used a port checking website to see if it worked and it says that the ports are down even after I enabled them in the Xfinity website. I logged in my router and tried to port trigger didn't work. The same goes for when I port forward on the website. Nothing seems to work any tips?