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A list of IP ranges that are allowed to perform updates on any domain.
-The default is ``0.0.0.0/0``, which means that all ranges are accepted.
+The default is ``127.0.0.0/8``, which means that all loopback addresses are accepted.
Multiple entries can be used on this line
(``allow-dnsupdate-from=198.51.100.0/8 203.0.113.2/32``). The option can
be left empty to disallow everything, this then should be used in