Router Charts

Click for Router Charts

Router Ranker

Click for Router Ranker

NAS Charts

Click for NAS Charts

NAS Ranker

Click for NAS Ranker

More Tools

Click for More Tools

Wireless How To

Introduction

aircrack first failed run

Our original WEP-cracking series appeared over two years ago and is still among the most popular articles on SmallNetBuilder. But to anyone trying to use the articles, it quickly becomes apparent that they were out of date and in desperate need of updating. That said, the originals still contain a lot of very relevant information so we suggest you read at least Part 1 before you start, as it contains some helpful background information.

Before we get started, however, let us make a few points that may save some readers the time and effort of trying these techniques:

  • To successfully follow this How To, you need basic familiarity with networking terminology and principles. You should be comfortable with using command line-based programs and basic familiarity with Linux will be helpful too.

  • These procedures assume that the target WLAN has at least one client associated with an AP or wireless router. They will not work with an AP that has no associated clients.

  • Accessing anyone else's network other than your own without the network owner's consent is at worst illegal in some U.S. jurisdictions and at best, not a neighborly thing to do.

    SmallNetBuilder, Pudai, LLC and the authors do not condone or approve of illegal use of this tutorial in any way.

With that out of the way, let’s proceed. What do you need to crack a WEP-protected wireless network these days? The good news is you probably already have everything you need to do it, since, in the two years since the original article, there have been many advances in the open source and wireless exploit tool world.

Gone are the days of requiring expensive, hard-to-find hardware (like the two PRISM 2 Wi-Fi cards and two computers in the original tutorial). Many more of the popular chipsets are now supported. Also you can do it all on a single machine!

The best WEP cracking toolset has been developed by the Aircrack-ng team, so that's what we're going to use. Aircrack-ng is a collection of programs aimed at WEP and WPA-PSK key cracking. While are are seven programs (plus a few Tools) in the suite, we'll be using four of them:

  • airmon-ng - for switching the wireless adapter into monitor mode
  • airodump-ng - for WLAN discovery and packet capture
  • aireplay-ng - for traffic generation
  • aircrack-ng - for recovering the WEP key

Although there are versions of the suite that run on Windows and even Zaurus (!) OSes, we're going to use the Linux version. Don't worry about not being a Linux expert, however, since we'll be using the BackTrack 2 (BT2) live CD, which will leave your Windows machine's hard drive unchanged. BT2 comes with the entire aircrack-ng suite already installed.

More Wireless

Win This!

TP-Link EAP330

You could win a TP-Link EAP330 AC1900 Wireless Dual Band Gigabit Ceiling Mount Access Point

Learn How!

Featured Sponsors




Top Ranked Routers

Support Us!

If you like what we do and want to thank us, just buy something on Amazon. We'll get a small commission on anything you buy. Thanks!

Over In The Forums

These bugs are pretty old but I decided to report only now. Actually they don't break any functions but just don't look good.1) The main page of OpenV...
A lot of us have ASUS wifi routers used only for wifi rather than for routing, In the case where your asus router is only an AP and your main router i...
Hi,I use router RT-N16 router with Netgear DM200 modem (in bridge mode).With official firmware and also with Merlin firmware some of HTTP web services...
HelloI have recently switched to an RT-AC88U. The router is working well but the list of connected devices shows a very weak WiFi signalView attachmen...
I have a IPSEC VPN between two locations. the remote location has a cisco 2950-12 in front of the router. The switch has a few VLANs configured to ass...

Don't Miss These

  • 1
  • 2
  • 3