express-ipfilter

express-ipfilter: A light-weight IP address based filtering system

This package provides easy IP based access control. This can be achieved either by blacklisting certain IPs and whitelisting all others, or whitelisting certain IPs and blacklisting all others.

Version

0.2.0

Installation

Recommended installation is with npm. To add node-ipfilter to your project, do:

npm install express-ipfilter

Usage with Express

NOTE: Starting with version 0.1.0, allow forwarded IP addresses through headers (forward, Cloudflare, Codio) are disabled by default. You must explicitly enable them by adding them to the allowedHeaders list.

Blacklisting certain IP addresses, while allowing all other IPs:

// Init dependencies
var express = require('express')
    , ipfilter = require('express-ipfilter').IpFilter
    , app = express.createServer()
    ;

// Blacklist the following IPs
var ips = ['127.0.0.1'];

// Create the server
app.use(ipfilter(ips));
app.listen(3000);

Whitelisting certain IP addresses, while denying all other IPs:

// Init dependencies
var express = require('express')
    , ipfilter = require('express-ipfilter').IpFilter
    , app = express.createServer()
    ;

// Whitelist the following IPs
var ips = ['127.0.0.1'];

// Create the server
app.use(ipfilter(ips, {mode: 'allow'}));
app.listen(3000);

Using CIDR subnet masks for ranges:

var ips = ['127.0.0.1/24'];

// Create the server
app.use(ipfilter(ips, {mode: 'allow'}));
app.listen(3000);

Using IP ranges:

var ips = [['127.0.0.1','127.0.0.10']];

// Create the server
app.use(ipfilter(ips, {mode: 'allow'}));
app.listen(3000);

See the example app for an example of how to handle errors.

Options

Property	Description	Type	Default
mode	whether to deny or allow to the IPs provided	string	deny
log	console log actions	boolean	true
allowedHeaders	an array of strings for header names that are acceptable for retrieving an IP address	array	[]
excluding	routes that should be excluded from ip filtering	array	[]

Contributing

Building from source

You can run grunt to build the source. This will run eslint and babel against src/ipfilter.js.

There is an included example project that will load the package from the local build for testing.

Running Tests

Run tests by using

grunt test

This will run eslint,babel, and mocha and output coverage data into coverage. Any pull request you submit needs to be accompanied by a test.

Changelog

0.2.0

• Changed how error handling works
• Removed settings for specific vendor ip addresses and added allowedHeaders to support those header-based IP addresses.
• You must now specifically require IpFilter, i.e. var ipfilter = require('express-ipfilter').IpFilter;
• If you want to handle errors you must require the error type as well var IpDeniedError = require('express-ipfilter').IpDeniedError;

0.1.1

• Added a favicon to the example to supress the 404 error looking for it.

0.1.0

• Changed default behavior of the library to disable reading forwarded IP headers. They must now be explicitly enabled.
• Using res.send when a failure occurs to allow for different formats of errorMessage

0.0.25

• Switched from netmask to range_check (uses ipaddr.js)
• Added support for IPv6 CIDR
• Fixed issue with mixed IPv4 and IPv6 rules

0.0.24

• Added lib to version control

0.0.23

• added codio x-real-ip header

0.0.22

• Added IPv6 Support
• Added build tools
• Added test coverage and reporting

0.0.20

• Added a setting to explicitly allow CloudFlare and Forwarded IPs. By default they are set to not allow these headers. Thanks to @longstone!

0.0.19

• Added detection for CloudFlare forwarded ips - https://github.com/baminteractive/express-ipfilter/commit/9aa43af14f5a003bad3145eef658f429808818f9 (@lafama)

0.0.18

• Fixing bug when array of CIDR blocks are used

0.0.16

• Fixing bug when no IP address can be determined

0.0.15

• Minor bug fix

0.0.14

• Adding the ability to have exclusion urls

0.0.12

• Diagnostic Options

0.0.11

• Bug Fix for port logic

0.0.10

• Added support for IPs with port numbers

0.0.9

• Fixing deploy issues

0.0.8

• Auto deploys for npm

0.0.7

• Add support ip ranges.

0.0.6

• Fixed a bug when using console output

0.0.5

• Added ability to block by subnet mask (i.e. 127.0.0.1/24)
• Added tests for cidr functionality

0.0.4

• Add tests
• Update docs
• Refactor, and restyle

0.0.1

• First revision

Credits

BaM Interactive - code.bamideas.com