[44net] Amprnet Gateway and Dynamic DNS.

Hi all, I've just got back to experimenting with IP over ax.25 after many years. I've got rip44d running on my Raspberry PI, and my gateway registered on the portal. My ISP doesn't supply static IP addresses, so I'm using no-ip for dynamic DNS. I'm planning to add support for the gateway to my BPQ32/LinBPQ ax.25 node software, but after searching the web, I can't find any info on how the Amprnet Gateway handles dynamic dns. So I have a few questions. Can anyone help with the answers? Does the gateway re-resolve each hostname before sending out each rip44 update? Or is the name just resolved to an address when it is added to the portal? Is there any mechanism for uses to send RIP messages back to the gateway when their addresses change? Is it possible to get a version of encap.txt that lists hoatnames instead of IP addresses, so uses can resolve them themselves? Thanks, John G8BPQ