Habbie7

In fact, returning both the CNAME and the A in the initial response is required. Returning just the CNAME and setting NOERROR tells a recursor 'the target name exists but I do not have an A record for it'. Luckily, all recursors I am aware of are stubborn and will then ask for the A anyway.

I had one of those. It's a very limited device, it runs some custom embedded OS (certainly not Linux) and craps out if you try to access it from two workstations at the same time, etc. etc.