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This post is on cracking Wi-Fi WPA passwords with "Reaver." Many people know that cracking a WEP password is fairly easy, so they use the more bulletproof WPA security protocol. Reaver is a program that exploits a security hole in wireless routers and can crack most routers' passwords with relative ease. First off, you will need the BackTrack 5 Live DVD. Download the Live DVD from BackTrack's download page and burn it to a DVD. Next, you need a computer with Wi-Fi and a DVD drive. Lastly, you need a nearby WPA-secured Wi-Fi Network. Using four steps you can hack into a WPA Wi-Fi Network. Step 1: Boot into BackTrack, Step 2: Install Reaver, Step 3: Gather the Router's information, and Step 4: Crack the WPA password to the Wi-Fi Network. Now I will explain how you can protect against Reaver attacks. Since the vulnerability lies in the implementation of WPS, your network should be safe if you can simply turn off WPS (or, even better, if your router doesn't support it in the first place), however Reaver may still be able to crack your password, even with WPS manually turned off. You could also set up MAC address filtering on your router (which only allows specifically whitelisted devices to connect to your network), but a sufficiently savvy hacker could detect the MAC address of a whitelisted device and use MAC address spoofing to imitate that computer. The good news is that there is a way to surely protect against Reaver. You can get the open-source router firmware DD-WRT installed on your router. Reaver has been tested on routers with this firmware and it was not able to crack the password. As it turns out, DD-WRT does not support WPS, so there's yet another reason to love the free router-booster.