HP-UX Reference (11i v2 04/09) - 4 File Formats (vol 8)

n
named.conf(4) named.conf(4)
[ notify-source (ip4_addr | *) [port ip_port] ; ]
[ notify-source-v6 (ip6_addr | *) [port ip_port] ; ]
[ zone-statistics yes_or_no ; ]
[ sig-validity-interval number ; ]
[ database string ; ]
[ min-refresh-time number ; ]
[ max-refresh-time number ; ]
[ min-retry-time number ; ]
[ max-retry-time number ; ]
}];
zone Statement Definition and Usage
Zone Types
master The server has a master copy of the data for the zone and will be able to provide authori-
tative answers for it.
slave A slave zone is a replica of a master zone. The masters list specifies one or more IP
addresses of master servers that the slave contacts to update its copy of the zone. By
default, transfers are made from port 53 on the servers; this can be changed for all
servers by specifying a port number before the list of IP addresses, or on a per-server
basis after the IP address. Authentication to the master can also be done with per-server
TSIG keys. If a file is specified, then the replica will be written to this file whenever the
zone is changed, and reloaded from this file on a server restart. Use of a file is recom-
mended, since it often speeds server start-up and eliminates a needless waste of
bandwidth. If the database files are very large, it is recommended to place them in
different directories.
stub A stub zone is similar to a slave zone, except that it replicates only the NS records of a
master zone instead of the entire zone. Stub zones are not a standard part of the DNS;
they are a feature specific to the BIND implementation. Stub zones can be used to elim-
inate the need for glue NS record in a parent zone at the expense of maintaining a stub
zone entry and a set of name server addresses in named.conf. This usage is not recom-
mended for new configurations, and BIND 9.2 supports it only in a limited way. In BIND
4/8, zone transfers of a parent zone included the NS records from stub children of that
zone. This meant that, in some cases, users could get away with configuring child stubs
only in the master server for the parent zone. BIND 9 never mixes together zone data
from different zones in this way. Therefore, if a BIND 9 master serving a parent zone
has child stub zones configured, all the slave servers for the parent zone also need to
have the same child stub zones configured. Stub zones can also be used to force the reso-
lution of a given domain to use a particular set of authoritative servers. For example, the
caching name servers on a private network using RFC2157 addressing may be configured
with stub zones for 10.in-addr.arpa to use a set of internal name servers as the authorita-
tive servers for that domain.
forward A forward zone can be used to configure forwarding on a per-domain basis. A zone state-
ment of type forward can contain a forward and/or forwarders statement, which will
apply to queries within the domain given by the zone name. If no forwarders statement
is present or an empty list for forwarders is given, then no forwarding will be done for
the domain, canceling the effects of any forwarders in the options statement. Thus if you
want to use this type of zone to change the behavior of the global forward option (that is,
"forward first to", then "forward only", or vice versa, but want to use the same servers as
set globally) you need to re-specify the global forwarders.
hint The initial set of root nameservers is specified using a hint zone. When the server starts
up, it uses the root hints to find a root nameserver and get the most recent list of root
nameservers. If no hint zone is specified for class IN, the server uses a compiled-in
default set of root servers hints. Classes other than IN have no built-in defaults hints.
Class
The zone’s name may optionally be followed by a class. If a class is not specified, class IN (for Internet), is
assumed. This is correct for the vast majority of cases. The "hesiod" class is named for an information
service from MIT’s Project Athena. It is used to share information about various systems databases, such
as users, groups, printers and so on. The keyword HS is a synonym for hesiod. Another MIT
HP-UX 11i Version 2: September 2004 − 20 − Hewlett-Packard Company Section 4−−195