Commit 0dd6d67f authored by Mark Andrews's avatar Mark Andrews

document type count limits

parent 04da28bd
......@@ -8,16 +8,6 @@
See the COPYRIGHT file distributed with this work for additional
information regarding copyright ownership.
..
Copyright (C) Internet Systems Consortium, Inc. ("ISC")
This Source Code Form is subject to the terms of the Mozilla Public
License, v. 2.0. If a copy of the MPL was not distributed with this
file, You can obtain one at http://mozilla.org/MPL/2.0/.
See the COPYRIGHT file distributed with this work for additional
information regarding copyright ownership.
.. Reference:
BIND 9 Configuration Reference
......@@ -5708,6 +5698,29 @@ never be updated). Note that when an attempt is made to delete all
records associated with a name, the rules are checked for each existing
record type.
If the type is immediately followed by a number in parentheses,
that number is the maximum number of records of that type permitted
to exist in the RRset after an update has been applied. For example,
``PTR(1)`` indicates that only one PTR record is allowed. If an
attempt is made to add two PTR records in an update, the second one
will be silently discarded. If a PTR record already exists, both
new records will be silently discarded.
If type ANY is specified with a limit, then that limit applies to
all types that are not otherwise specified. For example, ``A PTR(1)
ANY(2)`` indicates that an unlimited number of A records can exist,
but only one PTR record, and no more than two of any other type.
Typical use with rule ``grant * tcp-self . PTR(1);`` in the zone
2.0.192.IN-ADDR.ARPA::
nsupdate -v <<EOF
local 192.0.2.1
del 1.2.0.192.IN-ADDR.ARPA PTR
add 1.2.0.192.IN-ADDR.ARPA 0 PTR EXAMPLE.COM
send
EOF
The ruletype field has 16 values: ``name``, ``subdomain``, ``wildcard``,
``self``, ``selfsub``, ``selfwild``, ``krb5-self``, ``ms-self``,
``krb5-selfsub``, ``ms-selfsub``, ``krb5-subdomain``, ``ms-subdomain``,
......
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