Remote access not stable... Verizon Fios g3100 router problems?

Rebooted router while the Home Network Protection was on. The only difference in notifications was that it showed that I had turned the protection off and then on again at different points. But I’ve had my friend try to access my plex server, and it’s still inaccessible.

It’s just weird because sometimes the server works fine, and other times it just shuts down. Like my friend was able to watch movies on Saturday, but Sunday it wasn’t working. I was watching my server and it was up on Saturday, but went down on Sunday for whatever reason.

It’s just annoying because it seems to be up or down whenever it wants to.