I’ve talked both Verizon and Frontier about servers and both have basically said the same thing, if it’s private and locked off it’s fine. Meaning as long as it’s not public.
Now the terms still would give them an out if they decided they didn’t want you, but honestly as long as you’re not hurting the network they’d rather take your money.
> provide network content or any other services to anyone outside of your Premises local area network
I'm not sure if Verizon has the same intention, but if they take their own wording exceptionally strict, you would be in the wrong whenever you play a multiplayer game and end up being the host.
Generally in my own experience they don't want you hosting a service opened to the general public running all the time. I think running an open mail relay would get you banned very quick. It seems like this product is intended to be used purely for yourself.