Yay! I managed to actually use the Linode API with a properly constructed URL to update the IP addresses (IPv4 *and* IPv6) matching my NAS. That's the core of setting this up as DNS - by putting the 2 requests in a script to be regularly executed by a cron job. # that's a major step forward today: it took negotiating a few hurdles, but I got where I wanted to be :D # #