node-evil-dns's Introduction

Evil DNS

Override the IP address returned for one or more domains.

Note: This module modifies the core DNS library's lookup function.

Installation

npm install evil-dns

Usage

var evilDns = require('evil-dns');

// String match
evilDns.add('foo.com', '1.2.3.4');
// String with wild cards
evilDns.add('*foo.*', '1.2.3.4');
// RegExp match
evilDns.add(/^foo\.bar\..*$/i, '1.2.3.4');

// Remove domain entry
evilDns.remove('*foo.*','1.2.3.4');

// Remove domain by matching the RegExp source attributes
// When no ip is passed any entry matching the domain will be removed
evilDns.remove(/^foo\.bar\..*$/i);

// Remove all domain entries
evilDns.clear();

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node-evil-dns's Issues

Is the repo alive?

For 5 years there were no updates
I'd like to contribute an improved code base. If not will create another repo, but I prefer not to do so.

Node v20 support

Sadly this module no longer works in Node v20+. Going to take a look but seems core dns lookup must have been reworked.

async example

node-evil-dns patched node:dns and not node:dns/promises
If you need await:

import dns from 'node:dns'
import edns from 'evil-dns';
// import { lookup } from 'node:dns/promises'

// eDns has patched node:dns and not node:dns/promises
async function lookupAsync(domain) {
  return new Promise((resolve, reject) => {
    dns.lookup(domain, (err, address, family) => {
      if (err) reject(err)
      resolve({address, family})
    })
  })
}

;(async () => {

  var domain = 'my-domain.com'
  var {address, family} = await lookupAsync(domain)
  console.log(address, family)

  edns.add(domain, '1.2.3.4');
  var {address, family} = await lookupAsync(domain)
  console.log(address, family)

})()

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