Chapter 16. Berkeley Internet Name Domain (BIND)

241

16.3.1.2.

/etc/rndc.conf

You need to add the following lines to

/etc/rndc.conf

if

rndc

is to automatically use the keys

specified in

/etc/named.conf

. This is done with an

options

statement:

options {

default server

localhost;

default key

" key name ";

O

};

This command sets a global default key, but the

rndc

command can also use different keys for partic 

ular servers, as in the following example:

server localhost {

key

" key name ";

O

};

However, this

server

statement is only really helpful if you connect to multiple servers with

rndc

.

The

key

is the most important statement in

/etc/rndc.conf

.

key " key name " {

O

algorithm hmac md5;

secret " key value ";

O

};

The

key name

and

key value

should be exactly the same as their settings in

U

U

U

U

/etc/named.conf

.

To test all of the settings, try the

rndc reload

command. You should see response similar to this:

rndc: reload command successful

If the command was not successful, carefully look over the

/etc/named.conf

and

/etc/rndc.conf

files and look for errors.

16.3.2.

rndc

Command Line Options

An

rndc

command takes the following form:

rndc

options

command

command options

Oi 

Of 

O

The

options

area is not required, and you do not have to use

command options unless

U

U

U

U

the command requires them.

When executing

rndc

on a properly configured localhost, the following commands are available:

  halt

  Stops the

named

service immediately.

  querylog

  Turns on logging of all queries made by clients to this nameserver.

  refresh

  Refreshes the nameserver's database.

  reload

  Tells the nameserver to reload the zone files but keep all other previously cached re 

sponses. This allows you to make changes to zone files and have them take effect on your master

and slave servers without losing all stored name resolutions.

If your changes only affected a particular zone, you can tell

named

to only reload that one zone.

Type the name of the zone after the

reload

command.