Have you set up pagekite in the System settings page yet? That is how I originally bypassed Carrier Grade NAT (CGNAT) with my freedombox. Typically, ISP’s use CGNAT to block incoming requests on ports 25, 53, 80, 443, etc. so that you cannot serve from home. Pagekite is a type of proxy that bypasses this. I also had to use pagekite to obtain my SSL certificates with Let’s Encrypt. Hope that this helps! 