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wireles network hacks mods - briere D.

briere D. wireles network hacks mods - Wiley publishing, 2005. - 387 p.
ISBN: 0-7645-9583-0
Download (direct link): wirelesnetworkhacks.pdf
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Prepaid: Staking out the middle ground is the prepaid account. Just like prepaid cellular phones, you spend some amount of cash up front and then you burn off the “minutes” in your account. The biggest proponent of this approach is Wayport, who offers prepaid cards for between 3 and 20 “connections” — a connection being the equivalent of a day pass. Depending on how many you buy, you’ll pay between $5 and $8 per connection.
Which is the best approach? It depends upon two big factors: how often you need access, and how often you frequent locations served by the hot spot operator. If you always go to Starbucks or Borders, or always stay in a Wayport-served hotel chain, a monthly plan makes the most economic sense. If you’re an infrequent user, you may decide to just pay as you go.
If you travel a lot and you don’t always end up in locations served by a single hot spot operator, you might want to consider one of the roaming accounts we discuss next. They sometimes cost a bit more, but they provide a wide variety of mobile access solutions, including not only Wi-Fi but also hotel “wired” broadband and even dial-up Internet.
Putting on Your Roaming Shoes
If you’re a real road warrior, you probably won’t be able to stick to just one hot spot operator. We know some folks who are both road warriors and coffee hounds, and they basically work by traveling from Starbucks to Starbucks, ordering up quadruple lattes and T-Mobile hot spot access everywhere they go.
We’re going to use Starbucks/T-Mobile as an example here, but you can insert your own favorite hot spot operator.
Unfortunately, your ability to avoid the caffeine jitters may not equal that of our road warrior buddies (and friends don’t let friends drink decaf!). Or you simply may travel someplace where there is no Starbucks (yes, there are still a few places left!). If so, you may need the services of a hot spot roaming service provider.
760 Part III: Wireless on the Go
Figure 9-1:
The client not only gets you on Boingo’s network, but can control all your Wi-Fi.
For the most part, these roaming services are offered by some of the aggregators we discuss above. For example, Boingo — who partners with hundreds of hot spot operators of all sizes — provides roaming services on networks worldwide.
What these roaming providers all have in common is a series of roaming arrangements with the companies who own hot spots combined with a piece of client software that makes it easy for mobile users and travelers to find access wherever they are. This client software usually also includes security elements like two-way authentication (which ensures that you are who you say you are, and also that the hot spot is indeed the legitimate hot spot), VPN support, and encryption.
Oingo Boingo
For $21.95 a month, you can sign up for Boingo’s unlimited plan and connect to any of 16,000 hot spots worldwide. The best part about the Boingo experience, in our opinion, is the Boingo client software. This software is available for free download for Windows, Mac OS X, and even for Pocket PC handheld PCs and can be used for all of your Wi-Fi connection management. Figure 9-1 shows the Boingo interface in Windows XP.
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Chapter 9: On the Road Again with 802.11 161
Here comes the evil twin
We've all seen it before (on Melrose Place, at least). The trusted character starts acting in an unexpected and entirely inappropriate way. Too late, everyone discovers it wasn't the trusted character after all — it was his or her mysterious evil twin. (For you Doonesbury fans, it's George Bush's evil twin, Skippy!)
Well, that can happen at Wi-Fi hot spots too! You show up at a location where you expect to find your favorite hot spot provider, you turn on your computer, and up pops the old familiar "Acme hot spots" on the list of available networks. So you sign on to the captive portal Web page, enter your account password and username (or even your credit card), and go online. Except you aren't connected to Acme hot spots at all. You didn't give your confidential account information to the authentication system of Acme hot spots — you gave it to a bad guy!
The evil twin of the hot spot world is a cracker who uses her laptop to "mimic" the real hot spot by broadcasting an identical or deceptively
similar SSID near the real hot spot. If you log on, the bad guy uses fake Web pages that look deceptively like the real thing to steal your login information. He may even steal more of your personal information by serving up other fake Web sites (or simply copying everything you send and receive over the network).
The evil twin, by the way, is a variant of those annoying phishing e-mails that probably fill your inbox with fake (but realistic) bank and credit card Web pages.
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