This. Though theoretically you could do it without CGNAT, maybe some type of complex vlan arrangement? I'm not sure, I'm not a networkologist.

I do know that I just got fiber down my road from a smaller company, still a big multi state company, but not Comcast or charter big. I called them because I was worried about CGNAT for my self hosting. The salesman didn't know what I was talking about, which is disappointing but not surprising. But they forwarded me to the tech guys, who also claimed to not know what I was talking about... Which was either a downright lie, or they were idiots, either way it's very concerning.

The price was right though, $5 cheaper per month, for 10 times faster download, and 30 times faster upload. So I gave it a shot. Thankfully I'm not behind a CGNAT, yet 🤞