HP-UX IP Address and Client Management Administrator's Guide (October 2009)

Table 1-5 Boolean Options (continued)
DescriptionOption
Determines whether the local server, that is acting as a master, responds
with an incremental zone transfer when the remove slave server requests
an IXFR. If the provide-ixfr option is set to yes, incremental transfer
is provided whenever possible. If this option is set to no, all transfers to
the remote server is non-incremental.
If the provide-ixfr option is not set, the value of provide-ixfr in the
view or global options statement is used as default.
provide-ixfr
Determines whether the local server, acting as a slave, requests incremental
zone transfers from a remote master server. If this option is not set, the
value of request-ixfr in the view or global options statement is used
as a default.
request-ixfr yes_or_no;
Loads a new version of a master zone from the zone file of the server or
receives a new version of a slave file by a non-incremental zone transfer.
The server compares the new version of the master zone with the previous
version of master zone and calculates the set of differences. The differences
are then logged in the journal file of the zone such that the changes can be
transmitted to downstream slaves as an incremental zone transfer.
ixfr-from-differenc es
yes_or_no;
Flushes pending zone writes if the name server exits, because of the
SIGTERM signal. The default value is no if the pending zone writes are not
flushed when the name server exits, because of a SIGTERM signal.
flush-zones-on-shut down
yes_or_no;
Restricts the character set and syntax of certain domain names in the master
files and the DNS responses received from the network. The default differs
according to the zone type. For master zones, the default is fail. For slave
zones, the default is warn.
check-names ( master | slave
| response ) ( warn | fail |
ignore );
Specifies whether query logging must start when named starts. If querylog
is not specified, query logging is determined by the presence of the logging
category queries.
querylog yes_or_no;
Forwarding Options
You can use the forwarding facility to create a large site-wide cache on some servers, reducing
traffic over links to external name servers. You can also use this option to allow queries by servers
that intend to look up exterior names but do not have direct access to the Internet. Forwarding
occurs only on those queries for which the server is not authoritative and does not have the
answer in its cache.
Table 1-6 describes the forwarding options.
Table 1-6 Forwarding Options
DescriptionOption
This option is effective only if you specify the IP addresses in the
forwarders option for forwarding. A value of first (the default
value) causes the server to first query the IP addresses specified
in the forwarders list. If this query is not successful, the server
by itself searches the answer.
If the value is set as only, the server queries only the forwarder
IP addresses.
forward (only first);
This option specifies the IP addresses used for forwarding. The
default value is an empty list (that is, no forwarding).
forwarders { [ in_addr ; [ in_addr
; . . . ] ] };
34 Overview