Hey erictung, thank you for responding. With that CDN-Loop protection would a better setup be: Cloudflare > Firewall > VPN Server with rate limited ports > ISP? I wanna make sure that my network is protected as much as possible.
If you are trying to protect your own VPN server then the only product Cloudflare offers for this type of protection is Cloudflare Spectrum, which can be really expensive and custom port protection is only available for Enterprise plan clients.
Alternatively, Cloudflare Zero Trust services - Cloudflare Gateway can achieve the same protection.