named(8) — AIX PS/2 1.2.1



NAMED(8,C)                  AIX TCP/IP User's Guide                  NAMED(8,C)



-------------------------------------------------------------------------------
named



PURPOSE

Provides the server function for the Domain Name Protocol.

SYNTAX


              +--------------+   +---------------------+
/etc/named ---| +----------+ |---| +------+            |---|
              +-| -d level |-+   +-|      |- bootfile -+
               ^| -p port  ||      +- -b -+
               |+----------+|
               +------------+


DESCRIPTION

The named command is the Internet domain name server (refer to Domain Names -
Implementation and Specification, RFC883, for more details.)
Without any arguments, the named command reads the default boot file
/etc/named.boot, reads any initial data and listens for queries.


FLAGS

The named command options are:

-b     Specifies that the next argument is the name of the boot file.  If the
       boot file name is the last argument on the command line, the -b may be
       omitted.

-d     Prints debugging information.  A number after the -d determines the
       level of messages printed.

-p     Uses a different port number.  The default is the standard port number
       as listed in /etc/services (see "rc.tcpip, rc.tcpip.local").

EXAMPLES

Any additional argument is taken as the name of the boot file.  The boot file
contains information about where the name server is to get its initial data.
The following is a short example:








Processed October 29, 1990        NAMED(8,C)                                  1



NAMED(8,C)                  AIX TCP/IP User's Guide                  NAMED(8,C)



  ;
  ;        boot file for name server
  ;
  ; type      domain            source file or host
  ;
  domain      server1
  primary     server1           named.db
  secondary   cc.server1        10.2.0.78 128.32.0.10
  cache                         named.ca














































Processed October 29, 1990        NAMED(8,C)                                  2



NAMED(8,C)                  AIX TCP/IP User's Guide                  NAMED(8,C)




  o The first line specifies that "server1" is the domain for which the server
    is authoritative.

  o The second line states that the file "named.db" contains authoritative data
    for the domain "server1".  The file "named.db" contains data in the master
    file format described in RFC883 except that all domain names are relative
    to the origin.  In this case, "server1" (see below for a more detailed
    description).

  o The third line specifies that all authoritative data under "cc.server1" is
    to be transferred from the name server at 10.2.0.78.  If the transfer
    fails, it tries 128.32.0.10 and continues trying the addresses, up to 10,
    listed on this line.  The secondary copy is also authoritative for the
    specified domain.

  o The fourth line specifies data in "named.ca" is to be placed in the cache
    (well known data such as locations of root domain servers).  The file
    named.ca is in the same format as "named.db".

The master file, "named.db" in the example above, consists of entries such as:

  $INCLUDE <filename>
  $ORIGIN <domain>
  <domain> <opt_ttl> <opt_class> <type> <resource_record_data>

where domain is . for root, @ for the current origin, or a standard domain
name. If domain is a standard domain name that does not end with ., the current
origin is appended to the domain. Domain names ending with . are unmodified.
The opt_ttl field is an optional integer number for the time-to-live field.  It
defaults to zero.  The opt_class field is the object address type; currently
only one type is supported, IN, for objects connected to the DARPA Internet.
The type field is one of the following tokens; the data expected in the
resource_record_data field is in parentheses.

A           A host address (dotted quad)
NS          An authoritative name server (domain)
MX          A mail exchanger (domain)
CNAME       The canonical name for an alias (domain)
SOA         Marks the start of a zone of authority (5 numbers (see RFC883))
MB          A mailbox domain name (domain)
MG          A mail group member (domain)
MR          A mail rename domain name (domain)
NULL        A null resource record (no format or data)
WKS         A well know service description (not implemented yet)
PTR         A domain name pointer (domain)
HINFO       Host information (cpu_type OS_type)
MINFO       Mailbox or mail list information (request_domain error_domain)

Note:  The following signals have the specified effect when sent to the server
process using the kill command.




Processed October 29, 1990        NAMED(8,C)                                  3



NAMED(8,C)                  AIX TCP/IP User's Guide                  NAMED(8,C)



SIGHUP      Causes server to read /etc/named.boot and reload database.

SIGINT      Dumps current data base and cache to /tmp/named_dump.db

SIGUSR1     Turns on debugging; each SIGUSR1 increments debug level.

SIGUSR2     Turns off debugging completely.

FILES

/etc/named.boot          Name server configuration boot file

/etc/named.pid           The process ID

/tmp/named.run           Debug output

/tmp/named_dump.db       Dump of the name servers database

RELATED INFORMATION

In this book:  "resolv.conf"
kill, gethostbyname, refer to AIX Operating System Technical Reference
signal, refer to AIX Operating System Technical Reference
































Processed October 29, 1990        NAMED(8,C)                                  4

Museum

Related Articles