I'm running a DDWRT router with a NAS behind it. The NAS runs a service called Cloud Station. I'd like to restrict access to Cloud Station to a handful of hosts (family members). Each family member has an IP, but they are all dynamic (Comcast ISP) so I'd like to use DynDns which I've already setup.
I understand that I can setup restricted port forwarding with iptables (or using the DDWRT gui), but since the source IP may change, can I just use a dyndns hostname instead? If not, does anyone know a script I can run that can update the allowed IP?