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CHAPTER 3: Going Online with Android
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VPN and SSL
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VPNs (virtual private networks) allow you to log into your workplace intranet and enjoy the security of your corporate firewall without having to be hardwired into the network. Some places require this in order to access Exchange e-mail or view sensitive corporate files. VPNs are natively supported on some but not all Android phones. The Nexus One and Motorola DROID ship with VPN support, but earlier phones like the G1 did not. Android requires hacking for users to be able to log into root access. This is by design. There are apps that allow you to connect with VPN on rooted phones, but this should only be attempted if you know what you re doing. Mocana DSF offers a platform for developers who want to create VPNs and other security tools for Android phones. More information is available at http://mocana.com/dsf-android.html. This is geared toward large-scale deployments. If you re just using a personal phone, your best bet is to buy a model that supports VPNs. If you just need SSL (Secure Socket Layer) for connecting to a web server for file management, you can use ConnectBot. SSL is an Internet standard protocol for transferring information. It s commonly used for transferring files. ConnectBot is available in the Android Market. To log into a VPN, go to your home screen, press the Menu button, and go to Settings Wireless & network settings, as shown in Figure 3 2.
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Figure 3 2. VPN settings
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CHAPTER 3: Going Online with Android
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Next, you ll select VPN settings, as shown in Figure 3 3. If you ve already configured a VPN, it will be available here. Otherwise, you ll need to select Add VPN.
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Figure 3 3. Adding a VPN
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The supported choices for Android are shown in Figure 3 4. You ll need to obtain the specific format and settings from your workplace. They include PPTP, L2TP, L2TP/IPSec with PSK, and L2TP/IPSec CRT (certificate based). If your workplace doesn t support one of these protocols, you ll need to work with them to see if there s any other way to log in securely.
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Figure 3 4. VPN options
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CHAPTER 3: Going Online with Android
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VNC (Virtual Network Computing) is a way to share screens remotely and control one device from another, even if that device runs on a different platform. If you leave your office or home computer on at all times and your office allows it, you can use VNC to check documents, send e-mail, or execute work tasks from wherever you are. VNC can be used with Mac, Windows, and Linux computers. In order to use VNC securely, it should also be paired with a VPN. There are several VNC clients available for Android, including Android VNC Viewer, Remote VNC, and PhoneMyPC. Right now Android isn t a large target, but as the number of devices on the market will expand, so will the number of hackers targeting Android. The open OS gives anyone who wishes a glimpse of the code. That gives users a chance to patch flaws, but it also gives hackers a chance to find and exploit them. Android was built with security in mind, but some of that security relies on you. Apps are only allowed limited privileges. As you install apps from the Android Market, pay attention to the permissions you are granting. I ll cover this in more detail in 14.
Android s Web Browser
Now that I ve discussed the various ways Android phones can connect to data, let s talk about surfing the Web. Android has a full-featured web browser based on WebKit. This is the same base for the Chrome and Safari web browsers. Generally, it behaves the same as most web browsers. You can also download alternative browsers like Dolphin or Opera. One thing to note is that the Android browser is not Internet Explorer. You may encounter sites that absolutely will not work unless you use Internet Explorer. You may also encounter web sites that won t work without plug-ins and extensions that aren t available on Android. If you find this is the case, you might be able to get around it by using VNC and launching Internet Explorer from your remote computer.
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