dns-axfr

dns-axfr is a node.js module which extends dns core module to add support for AXFR type queries. It can be useful for pentesting tasks, automating recursive zone transfers, etc...

The following type of records are supported:

• A
• CNAME
• SOA
• MX
• NS
• TXT
• AAAA
• SPF
• SRV

Usage

In otder to perform an AXFR query use resolveAxfr()

resolveAxfr(server, zone, callback)

var dns = require('dns-axfr');
var util = require('util');

dns.resolveAxfr('dns01.acme.com', 'acme.com', function(err, addr) {
    if (err) {
        console.error('Error ocurred: ' + addr + ' (' + err + ')');
        return;
    }

    console.log(util.inspect(addr));
});

If you need to setup a timeout for the request use resolveAxfrTimeout() and set the desired timeout in milliseconds.

resolveAxfrTimeout(timeout)

var dns = require('dns-axfr');
var util = require('util');

dns.resolveAxfrTimeout(1000);

dns.resolveAxfr('dns01.acme.com', 'acme.com', function(err, addr) {
    if (err) {
        console.error('Error ocurred: ' + addr + ' (' + err + ')');
        return;
    }

    console.log(util.inspect(addr));
});

As this module extends the core dns module, you can access the original module without "requiring" it again:

var dns = require('dns-axfr');
var util = require('util');

/* Extended function */
dns.resolveAxfr('dns01.acme.com', 'acme.com', function(err, addr) {
    if (err) throw err;
    console.log(util.inspect(addr));
});

/* Original dns module function */
dns.resolve4('www.google.com', function (err, addresses) {
  if (err) throw err;
  console.log(util.inspect(addresses));
});

Sample results

{
    questions: [
        {
            name: 'acme.es.',
            type: 'AXFR'
        }
    ],
    answers: [
        {
            name: 'acme.es.',
            type: 'SOA',
            ttl: 21600,
            dns: 'ns1.acme.es.',
            mail: 'root.ns1.acme.es.',
            serial: 2015012401,
            refresInterval: 14400,
            retryInterval: 7200,
            expireLimit: 2592000,
            minTTL: 28800
        },
        {
            name: 'acme.es.',
            type: 'A',
            ttl: 21600,
            a: '127.0.2.22'
        },
        {
            name: 'acme.es.',
            type: 'NS',
            ttl: 21600,
            ns: 'ns1.acme.es.'
        },
        {
            name: 'acme.es.',
            type: 'NS',
            ttl: 21600,
            ns: 'ns2.acme.es.'
        },
        {
            name: 'subdomain.acme.es.',
            type: 'NS',
            ttl: 21600,
            ns: 'ns1.acme.es.'
        },
        {
            name: 'subdomain.acme.es.',
            type: 'NS',
            ttl: 21600,
            ns: 'ns2.acme.es.'
        },
        {
            name: 'ns1.acme.es.',
            type: 'A',
            ttl: 21600,
            a: '127.0.2.69'
        },
        {
            name: 'ns2.acme.es.',
            type: 'A',
            ttl: 21600,
            a: '127.0.2.70'
        },
        {
            name: 'test.acme.es.',
            type: 'CNAME',
            ttl: 21600,
            cname: 'www.acme.com.'
        },
        {
            name: 'www.acme.es.',
            type: 'A',
            ttl: 21600,
            a: '127.0.2.22'
        }
    ]
}