HP-UX Reference (11i v2 03/08) - 4 File Formats (vol 8)

n
named.conf(4) named.conf(4)
zone-statistics
If "yes", the server will, by default, collect statistical data on all zones in the server. These
statistics may be accessed using rndc stats, which will dump them to the file listed in the
statistics-file.
provide-ixfr
clause determines whether the local server, acting as master, will respond with an incremen-
tal zone transfer when the given remote server, a slave, requests it. If set to "yes", incremen-
tal transfer will be provided whenever possible. If set to "no", all transfers to the remote
server will be non-incremental. If not set, the value of the
provide-ixfr option in the
view or global options block is used as a default.
request-ixfr
The request-ixfr clause determines whether the local server, acting as a slave, will
request incremental zone transfers from the given remote server, a master. If not set, the
value of the request-ixfr option in the view or global options block is used as a default.
additional-from-auth
, additional-from-cache
These options control the behavior of an authoritative server when answering queries which
have additional data, or when following CNAME and DNAME chains.
When both of these options are set to "yes" (the default) and a query is being answered from
authoritative data (a zone configured into the server), the additional data section of the reply
will be filled in using data from other authoritative zones and from the cache. In some situa-
tions this is undesirable, such as when there is concern over the correctness of the cache, or
in servers where slave zones may be added and modified by untrusted third parties. Also,
avoiding the search for this additional data will speed up server operations at the possible
expense of additional queries to resolve what would otherwise be provided in the additional
section. For example, if a query asks for an MX record for host foo.example.com, and the
record found is "MX 10 mail.example.net", normally the address records (A, A6, and AAAA)
for mail.example.net will be provided as well, if known. Set these options to "no" to disable
this behavior. These options are intended for use in authoritative-only servers, or in
authoritative-only views. Attempts to set them to "no" without also specifying recursion "no"
will cause the server to ignore the options and log a warning message.
Specifying
additional-from-cache no
actually disables the use of the cache not only
for additional data lookups but also when looking up the answer. This is usually the desired
behavior in an authoritative-only server where the correctness of the cached data is an issue.
When a name server is non-recursively queried for a name that is not below the apex of any
served zone, it normally answers with an "upwards referral" to the root servers or the
servers of some other known parent of the query name.
Since the data in an upwards referral comes from the cache, the server will not be able to
provide upwards referrals when
additional-from-cache no
has been specified.
Instead, it will respond to such queries with REFUSED. This should not cause any problems
since upwards referrals are not required for the resolution process.
match-mapped-addresses
If "yes", then an IPv4-mapped IPv6 address will match any address match list entries that
match the corresponding IPv4 address.
Forwarding
The forwarding facility can be used to create a large site-wide cache on a few servers, reducing traffic
over links to external nameservers. It can also be used to allow queries by servers that do not have direct
access to the Internet, but wish to look up exterior names anyway. Forwarding occurs only on those
queries for which the server is not authoritative and does not have the answer in its cache.
forward This option is useful only if the forwarders list is not empty. The default value first,
causes the server to query the forwarders first, and if that is unable to answer the question,
the server will then look for the answer itself. If only is specified, the server will only
query the forwarders.
forwarders
Specifies the IP addresses to be used for forwarding. The default is the empty list (no for-
warding).
Section 4−−186 Hewlett-Packard Company − 11 − HP-UX 11i Version 2: August 2003