HP-UX IP Address and Client Management Administrator's Guide HP-UX 11i v2, HP-UX 11i v3

Table 1-5 Boolean Options (continued)
DescriptionOption
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
; . . . ] ] };
Name-Checking Option
The server checks the domain names based on their expected client contexts. For example, you
can check whether a domain name used as a host name complies with the RFCs that define valid
host names:
check-names (master | slave | response )(warn
| fail | ignore);
The server can check names in three areas:
• master – Checks master zone files.
• slave – Checks slave zone files.
• response – Checks the query’s response when the server has initiated the query.
BIND Name Service Overview 33