HP-UX Reference (11i v2 07/12) - 4 File Formats (vol 8)

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named.conf(4) named.conf(4)

the current domain name revert to the values they had prior to the

$INCLUDE once the ﬁle has been read.

Note: RFC 1035 speciﬁes that the current origin should be restored after an

$INCLUDE, but it is silent

on whether the current domain name should also be restored. BIND 9 restores both of them. This could be

construed as a deviation from RFC 1035, a feature, or both.

The $TTL Directive

Syntax:

$TTL

default-ttl [comment]

Set the default Time To Live (TTL) for subsequent records with undeﬁned TTLs. Valid TTLs are of the

range 0-2147483647seconds. $TTL is deﬁned in RFC 2308.

BIND Master File Extension: the $GENERATE Directive

Syntax:

$GENERATE

range lhs type rhs [comment]

$GENERATE is used to create a series of resource records that only differ from each other by an iterator.

$GENERATE can be used to easily generate the sets of records required to support sub /24 reverse delega-

tions described in RFC 2317: Classless IN-ADDR.ARPA delegation.

$ORIGIN 0.0.192.IN-ADDR.ARPA.

$GENERATE 1-2 0 NS SERVER$.EXAMPLE.

$GENERATE 1-127 $ CNAME $.0

is equivalent to

0.0.0.192.IN-ADDR.ARPA NS SERVER1.EXAMPLE.

0.0.0.192.IN-ADDR.ARPA NS SERVER2.EXAMPLE.

1.0.0.192.IN-ADDR.ARPA CNAME 1.0.0.0.192.IN-ADDR.ARPA

2.0.0.192.IN-ADDR.ARPA CNAME 2.0.0.0.192.IN-ADDR.ARPA

...

127.0.0.192.IN-ADDR.ARPA CNAME 127.0.0.0.192.IN-ADDR.ARPA

range This can be either of the two forms: start-stop or start-stop/step. If the ﬁrst form is used, then

step is set to 1. All of start, stop and step must be positive.

lhslhs describes the owner name of the resource records to be created. Any single $ symbols within the

lhs side are replaced by the iterator value.

To get a $ in the output you need to escape the $ using a backslash \, e.g. \$. The $ may option-

ally be followed by modiﬁers which change the offset from the interator, ﬁeld width and base.

Modiﬁers are introduced by a { immediately following the $ as ${offset[,width[,base]]}. e.g.

${-20,3,d} which subtracts 20 from the current value, prints the result as a decimal in a zero pad-

ded ﬁeld of with 3. Available output forms are decimal (d), octal (o), and

hexade-

cimal

(x or X for uppercase). The default modiﬁer is ${0,0,d}. If the lhs is not absolute,

the current $ORIGIN is appended to the name.

For compatibility with earlier versions $$ is still recognized a indicating a literal $ in the output.

type At present the only supported types are PTR, CNAME, DNAME, A, AAAA and NS.

rhsrhs is a domain name. It is processed similarly to lhs.

The $GENERATE directive is a BIND extension and not part of the standard zone ﬁle format.

WARNINGS

IPv6 is supported on HP-UX 11i Version 1.0, with the optional IPv6 software installed. Currently, IPv6 is

not supported on systems running HP-UX 11i Version 1.6.

AUTHOR

named.conf was developed by Internet Software Consortium (ISC).