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DNS Generator

Generate DNS files using json

Install

Install the command line tool dnsgen

npm install -g dnsgen

Install locally to use as a module

npm install dnsgen

Usage

Command line

dnsgen bind reverse < example.json

As a module

var dnsgen = require('dnsgen');

Example

Command line tool

The command line tool reads json from stdin, and pipes the output to stdout

$ dnsgen bind < example.json
; Bind file for example.com (10.0.0.0/23)
@   IN  SOA ns1.example.com.    admin.example.com. (
    2012081701  ; serial
    28800   ; refresh
    7200    ; retry
    864000  ; expire
    86400   ; ttl
)
example.com.    IN  NS  ns1.example.com.
example.com.    IN  NS  ns2.example.com.
gw  IN  A   10.0.0.1
zelda   IN  A   10.0.0.2    ; Testing Box
link    IN  A   10.0.0.3    ; Another box for testing
gw2 IN  A   10.0.1.1

You can also generate reverse lookup files

$ dnsgen bind reverse < example.json
; Bind file for example.com (10.0.0.0/23)
@   IN  SOA ns1.example.com.    admin.example.com. (
    2012081701  ; serial
    28800   ; refresh
    7200    ; retry
    864000  ; expire
    86400   ; ttl
)
    IN  NS  ns1.example.com.
    IN  NS  ns2.example.com.
0.1 IN  PTR gw.example.com.
0.2 IN  PTR zelda.example.com.  ; Testing Box
0.3 IN  PTR link.example.com.   ; Another box for testing
1.1 IN  PTR gw2.example.com.

Tiny dns is also cool

$ dnsgen tinydns < example.json
# tinydns file for example.com (10.0.0.0/23)
Zexample.com:ns1.example.com:admin.example.com:2012081701:28800:7200:864000
&example.com::ns1.example.com:86400
&example.com::ns2.example.com:86400
=gw:10.0.0.1
=zelda:10.0.0.2 # Testing Box
=link:10.0.0.3  # Another box for testing
=gw2:10.0.1.1

Node Module

The exports of dnsgen return a stream that you can pipe anywhere you want

var dnsgen = require('dnsgen'),
    json = require('./example.json');

// Generate forward lookup file
dnsgen.bind(json).pipe(process.stdout);

// Generate reverse lookup file
dnsgen.bindReverse(json).pipe(process.stdout);

// Generate tinydns config
dnsgen.tinydns(json).pipe(process.stdout);

example.json

{
  "domain": "example.com",
  "admin": "admin.example.com",
  "time": {
    "refresh": 28800,
    "retry": 7200,
    "expire": 864000,
    "ttl": 86400
  },
  "ns": [
    "ns1.example.com",
    "ns2.example.com"
  ],
  "netmask": "10.0.0.0/23",
  "hosts": {
    "10.0.0.1": "gw",
    "10.0.0.2": {
      "name": "zelda",
      "comment": "Testing Box"
    },
    "10.0.0.3": {
      "name": "link",
      "comment": "Another box for testing"
    },
    "10.0.1.1": "gw2"
  }
}

Tests

npm test

Known Limitations

  • This module only supports outputting files suitable for BIND and tiny DNS servers.
  • Only A, NS and PTR records can be generated

License

MIT Licensed