#dns-comparer

Checks that two domains point to the same ip.

Problem

If you need to check if two domain names points to the same ip, this module is for that.

Usage

var compare = require('dns-comparer').compare;

// can check two domains
compare('google.com', 'dns.google.com', function(err, result){
    err && console.error(err);
    console.log(result);
    // output will be
    // { intersected: false,
    //   exact: false,
    //   domain1: 'google.com',
    //   domain2: 'dns.google.com',
    //   ips1: ['213.59.210.88','213.59.210.89','213.59.210.84'],
    //   ips2: ['173.194.32.160','173.194.32.169','173.194.32.174'],
    //   intersection: [] 
    // }
});

// can check also ips
compare('google.com', '173.194.122.199', function(err, result){
    err && console.error(err);
    console.log(result);
    // { intersected: true,
    // exact: false,
    // domain1: 'google.com',
    // domain2: '173.194.122.199',
    // ips1:
    //  [ '173.194.122.199',
    //    '173.194.122.195',
    //    '173.194.122.198'],
    // ips2: [ '173.194.122.199' ],
    // intersection: [ '173.194.122.199' ] }
});

Find more usage examples here

Callback

Callback returns error as a first param with if something went wrong (ex. no DNS record for domain found). Callback returns result object as a second param if comparing was done:

{
    intersected: Boolean, // indicates if domains points to common ips
    exact: Boolean, // if domains point to exactly the same ip or ips
    domain1: String, // first domain name to check
    domain2: String, // second domain name to check
    ips1: Array, // ips for first domain
    ips2: Array, // ips for second domain
    intersection: Array // common ips for first and second domains
}