I’m trying the DNS Tunneling attack. I have a doubt about the domain to be created and the DNS configuration. I created a type A tunnel.ddns.net domain. Now, two DNS records must be configured: an NS record to route queries for the tunnel.ddns.net domain to the Iodine server and an A record to define the IP address of the Iodine server. Is it correct ? The DNS configuration can be done on cloudflare?