Easy: you need to set a CNAME record in your xxxx.com domain, pointing to your dynamic DNS domain at xxxx.strangled.net
DNS resolver will follow the CNAME transparently. User will not notice any difference. It might add a hundred milliseconds or so to the whole query, but that shouldn’t be a problem. When you type htpc.xxxx.com in your browser, it will still stay htpc.xxxx.com. You will not even realize that the strangled.net address is involved in all this.
