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@nutes-uepb/express-ip-whitelist

v1.0.0

Published

An express middleware for access permissions based on Host/IP addresses. Hosts/IPs of the clients that are not on the whitelist have access blocked.

Downloads

11

Readme

License NPM Version NPM Downloads Travis Coverage Vulnerabilities

Express IP Whitelist

An express middleware for access permissions based on Host/IP addresses. Hosts/IPs of the clients that are not on the whitelist have access blocked.

Features

  • Create a list of permissions with hostnames and IP addresses and control who can access the resources of your API;
  • Support IPv4, IPv6, CIDR format & IPv4 mapped IPv6 addresses;
  • Custom log function;
  • Custom message function.

Installation

npm i @nutes-uepb/express-ip-whitelist


Usage

To use middleware is very simple, just import and then define your list of permissions and available options, such as log and message.

const whitelist = require('@nutes-uepb/express-ip-whitelist');

// Create middleware.
const middleware = whitelist(['127.0.0.1', 'www.client.com'], options);

// Injecting middleware into instance express
const express = require('express');
const app = express();
app.use(middleware);

Options

const options = {  
  log: (clientIp, accessDenied) => {
      console.log(`${clientIp} access ${accessDenied ? 'denied!' : 'allowed!'}`)  
 }, message: function (err, clientIp) {  
	  return {error: `Client with IP address ${clientIp} is not allowed!`}  
 }};

The options are not mandatory and have default values.

  • log: Allows you to manipulate the log on each request. To disable log assign its value equal to false.
    • Valor default:
      function (clientIp, accessDenied) {	
          console.log(`Access ${accessDenied ? 'denied' : 'allowed'} for ip address ${clientIp}`)  
      }
  • message: Allows you to handle the error message when the client IP is not on the whitelist. The status code will always be 401.
    • Valor default:
      function (err, clientIp) {  
          return {  
              code: '401',  
              message: 'Unauthorized',  
              description: `Access denied for IP address ${clientIp}`  
          }  
      }