Securing zone transfer and DDNS

[Jan-Piet Mens]

> I have one more question - how can I block every update for every zone
> in options section using update-policy?

Are you actually *reading* the documentation: the ARM actually defines
`allow-update':

        "Specifies which hosts are allowed to submit Dynamic DNS updates
        for master zones. The default is to deny updates from all
        hosts."

        -JP