source: trunk/reverse-patterns.html@ 686

Last change on this file since 686 was 685, checked in by Kris Deugau, 9 years ago

/trunk

Add some new template pattern options to autogenerate -net/-gw/-bcast
tags, and "n'th usable IP in range". Update online reference
reverse-patterns.html with the new patterns.
File size: 5.6 KB
Line 
1<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
3 <head>
4 <meta http-equiv="content-type" content="text/html; charset=UTF-8" />
5 <title>Reverse DNS Template Reference</title>
6 <!-- General stylesheet for most content, all browsers -->
7 <link rel="stylesheet" type="text/css" href="templates/dns.css" />
8 <!-- Custom local stylesheet, if desired -->
9 <link rel="stylesheet" type="text/css" href="local.css" />
10 </head>
11 <body>
12 <div id="main">
13 <h2>Reverse DNS Template Reference</h2>
14 <table class="container" cellpadding="2" cellspacing="2" style="max-width:850px;">
15 <tbody>
16 <tr class="tableheader">
17 <td></td>
18 <td>Substitution pattern</td>
19 <td>Example expansion using 192.168.23.45</td>
20 </tr>
21 <tr class="tableheader">
22 <td colspan="3">Whole-IP patterns</td>
23 </tr>
24 <tr class="row0">
25 <td>Dashed IP</td>
26 <td>%i</td>
27 <td>192-168-23-45</td>
28 </tr>
29 <tr class="row1">
30 <td>Reverse dashed IP</td>
31 <td>%r</td>
32 <td>45-23-168-192</td>
33 </tr>
34 <tr class="row0">
35 <td>Hex-coded IP</td>
36 <td>%h</td>
37 <td>c0a8172d</td>
38 </tr>
39 <tr class="row1">
40 <td>Decimal IP</td>
41 <td>%d</td>
42 <td>323241453</td>
43 </tr>
44 <tr class="row0">
45 <td colspan="3">
46 %i and %r also allow explicitly defining the separator; eg %.i or %_r. Dot/period (.), dash (-),
47 and underscore (_) are the only characters supported since DNS names may not contain most
48 other non-alphanumerics.
49 </td>
50 </tr>
51 <tr class="row0">
52 <td colspan="3">
53 %blank% may be used to specifically prevent template expansion on a segment of a block if
54 desired; eg, if 192.168.23.0/24 has "unused-%i.example.com" set, adding an A+PTR template
55 for 192.168.23.48/30 of "%blank%" will leave 192.168.23.48 through .51 without PTR records
56 unless specific entries exist for those IPs.
57 </td>
58 </tr>
59 <tr class="tableheader">
60 <td colspan="3">Per-octet patterns (1, 2, 3, or 4 specify
61 the octet; d, h or 0 specify decimal, hexidecimal, or
62 0-padded decimal)</td>
63 </tr>
64 <tr class="row0">
65 <td>First octet, decimal</td>
66 <td>%1d</td>
67 <td>192</td>
68 </tr>
69 <tr class="row1">
70 <td>Third octet, 0-padded</td>
71 <td>%30</td>
72 <td>023</td>
73 </tr>
74 <tr class="row0">
75 <td>Fourth octet, hexidecimal</td>
76 <td>%4h</td>
77 <td>2d</td>
78 </tr>
79 <tr class="row1">
80 <td>All octets, different expansions</td>
81 <td>%1h-%2d-%30-%4h</td>
82 <td>c0-168-023-2d</td>
83 </tr>
84
85 <tr class="row0"><td colspan="3">&nbsp;</td></tr>
86
87 <tr class="tableheader">
88 <td colspan="3">Extensions</td>
89 </tr>
90 <tr class="tableheader">
91 <td></td>
92 <td>Substitution pattern</td>
93 <td>Example expansion using 192.168.23.40/29</td>
94 </tr>
95 <tr class="row0">
96 <td>Network/<br />gateway/<br />broadcast</td>
97 <td>%ngb%</td>
98 <td>
99 customer-%i%ngb%.example.com<br />
100 192.168.23.40 -> customer-net.example.com<br />
101 192.168.23.41 -> customer-gw.example.com<br />
102 192.168.23.42 -> customer-192-168-23-42.example.com<br />
103 192.168.23.43 -> customer-192-168-23-43.example.com<br />
104 192.168.23.44 -> customer-192-168-23-44.example.com<br />
105 192.168.23.45 -> customer-192-168-23-45.example.com<br />
106 192.168.23.46 -> customer-192-168-23-46.example.com<br />
107 192.168.23.47 -> customer-bcast.example.com
108 </td>
109 </tr>
110 <tr class="row1">
111 <td colspan="3">
112 Any IP pattern component is blanked on the network, gateway, and broadcast IPs when this is
113 used.<br />
114 Each of n, g, or b can be prefixed with a dash, eg %-ng-b% or %n-g-b%, which will
115 blank that entire entry instead of substituting <tt>net</tt>, <tt>gw</tt>, or <tt>bcast</tt>.
116 </td>
117 </tr>
118 <tr class="row0">
119 <td>n'th usable IP</td>
120 <td>%c</td>
121 <td>
122 customer-%3d-%c.example.com<br />
123 192.168.23.40 -> customer-23.example.com<br />
124 192.168.23.41 -> customer-23.example.com<br />
125 192.168.23.42 -> customer-23-1.example.com<br />
126 192.168.23.43 -> customer-23-2.example.com<br />
127 192.168.23.44 -> customer-23-3.example.com<br />
128 192.168.23.45 -> customer-23-4.example.com<br />
129 192.168.23.46 -> customer-23-5.example.com<br />
130 192.168.23.47 -> customer-23.example.com
131 </td>
132 </tr>
133 <tr class="row1">
134 <td colspan="3">
135 c can be prefixed with a dash (%-c), which starts the numbering from the conventional gateway IP
136 instead. (.41 above would be 1, .42 2, etc, finishing with 6 at .46).
137 </td>
138 </tr>
139 </tbody>
140 </table>
141
142 </div>
143 </body>
144</html>
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