I once bought a router to use for my internet when I moved into my new house just to find out that it "wasn't compatible" with Verizon's service. I still have it (because I'm terrible about returning things). Is there any point in keeping it? Is there anything fun or interesting that I could do with it?
I just don't fully trust the ISP router, so I disabled the wifi and hooked it up to my own router. If the ISP router gets hacked, my internal network doesn't get exposed.
Port forwarding is a bit harder, but you probably aren't even doing that at all (and it still works anyway, it's just an extra step).
That's an interesting idea. How do you access the router connected to the ISP to setup port forwarding to your second router? If it's too complicated to type out here, I'll understand.