1rndc.conf(4) File Formats rndc.conf(4)
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6 rndc.conf - rndc configuration file
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9 rndc.conf
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13 rndc.conf is the configuration file for rndc, the BIND 9 name server
14 control utility. This file has a similar structure and syntax to
15 named.conf. Statements are enclosed in braces and terminated with a
16 semi-colon. Clauses in the statements are also semi-colon terminated.
17 The usual comment styles are supported:
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19 C style /* */
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22 C++ style // to end of line
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25 Unix style # to end of line
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29 rndc.conf is much simpler than named.conf. The file uses three state‐
30 ments: an options statement, a server statement and a key statement.
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33 The options statement contains three clauses. The default-server clause
34 is followed by the name or address of a name server. This host is used
35 when no name server is provided as an argument to rndc. The default-key
36 clause is followed by the name of a key which is identified by a key
37 statement. If no keyid is provided on the rndc command line, and no key
38 clause is found in a matching server statement, this default key will
39 be used to authenticate the server's commands and responses. The
40 default-port clause is followed by the port to connect to on the remote
41 name server. If no port option is provided on the rndc command line,
42 and no port clause is found in a matching server statement, this
43 default port will be used to connect.
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46 After the server keyword, the server statement includes a string which
47 is the hostname or address for a name server. The statement has two
48 possible clauses: key and port. The key name must match the name of a
49 key statement in the file. The port number specifies the port to con‐
50 nect to.
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53 The key statement begins with an identifying string, the name of the
54 key. The statement has two clauses. algorithm identifies the encryption
55 algorithm for rndc to use; currently only HMAC-MD5 is supported. This
56 is followed by a secret clause which contains the base-64 encoding of
57 the algorithm's encryption key. The base-64 string is enclosed in dou‐
58 ble quotes.
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61 There are two common ways to generate the base-64 string for the
62 secret. The BIND 9 program rndc-confgen(1M) can be used to generate a
63 random key, or the mmencode program, also known as mimencode, can be
64 used to generate a base-64 string from known input. mmencode does not
65 ship with BIND 9 but is available on many systems. See the EXAMPLES
66 section for sample command lines for each.
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69 options {
70 default-server localhost;
71 default-key samplekey;
72 };
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74 server localhost {
75 key samplekey;
76 };
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78 key samplekey {
79 algorithm hmac-md5;
80 secret
81 "c3Ryb25nIGVub3VnaCBmb3IgYSBtYW4gYnV0IG1hZGUgZm9yIGEgd29tYW4K";
82 };
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88 In the above example, rndc by default uses the server at localhost
89 (127.0.0.1) and the key called samplekey. Commands to the localhost
90 server use the samplekey key, which must also be defined in the
91 server's configuration file with the same name and secret. The key
92 statement indicates that samplekey uses the HMAC-MD5 algorithm. Its
93 secret clause contains the base-64 encoding of the HMAC-MD5 secret
94 enclosed in double quotes.
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97 To generate a random secret with rndc-confgen:
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99 rndc-confgen
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104 A complete rndc.conf file, including the randomly generated key, will
105 be written to the standard output. Commented out key and controls
106 statements for named.conf are also printed.
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109 To generate a base-64 secret with mmencode:
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111 echo "known plaintext for a secret" | mmencode
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116 The name server must be configured to accept rndc connections and to
117 recognize the key specified in the rndc.conf file, using the controls
118 statement in named.conf. See the sections on the controls statement in
119 the BIND 9 Administrator Reference Manual for details.
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122 See attributes(5) for descriptions of the following attributes:
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127 ┌─────────────────────────────┬─────────────────────────────┐
128 │ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
129 ├─────────────────────────────┼─────────────────────────────┤
130 │Availability │SUNWbind │
131 ├─────────────────────────────┼─────────────────────────────┤
132 │Interface Stability │External │
133 └─────────────────────────────┴─────────────────────────────┘
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136 rndc(1M), rndc-confgen(1M), attributes(5)
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139 BIND 9 Administrator Reference Manual
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143SunOS 5.11 24 Dec 2008 rndc.conf(4)