You don't direct ports from cloudflare, you direct them at your home router. All you're doing is setting a domain name (A record) on cloudflare so when subscribers try to connect to your your server at wow.yourdomainaddress.net, the traffic gets pointed to your home router. When the traffic packets come into your home router, there is where you want to direct where to go for ports 8085 and 3724, which is your server you're hosting your auth and world server on. Your router will filter that traffic based off your port forwarding rules on your home router, which will direct them to your WoW server within your home.