Update dnsupdate.rst

diff --git a/docs/dnsupdate.rst b/docs/dnsupdate.rst
index da9605e2ba268675c25673cd43a15f82d8c2aa0b..09739da3c6682ef37f965a27721c224d6986f558 100644 (file)
--- a/docs/dnsupdate.rst
+++ b/docs/dnsupdate.rst
@@ -44,7 +44,8 @@ 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
 combination with the ``ALLOW-DNSUPDATE-FROM`` :doc:`domain metadata <domainmetadata>` setting per
-zone.
+zone. Setting a range here and in ``ALLOW-DNSUPDATE-FROM`` enables updates
+from either address range.
 
 ``forward-dnsupdate``
 ~~~~~~~~~~~~~~~~~~~~~