Bind 9 Administrator Reference Manual

Chapter 6. BIND 9 Conﬁguration Reference

use-id-pool

This option is obsolete. BIND 9 always allocates query IDs from a pool.

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. See

also Section 6.2.14.15.

use-ixfr

This option is obsolete. If you need to disable IXFR to a particular server or servers see the

information on the provide-ixfr option in Section 6.2.16. See also Section 4.2.

provide-ixfr

See the description of provide-ixfr in Section 6.2.16

request-ixfr

See the description of request-ixfr in Section 6.2.16

treat-cr-as-space

This option was used in BIND 8 to make the server treat carriage return ("\r") characters the same

way as a space or tab character, to facilitate loading of zone ﬁles on a UNIX system that were

generated on an NT or DOS machine. In BIND 9, both UNIX "\n" and NT/DOS "\r\n" newlines are

always accepted, and the option is ignored.

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 situations 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