zen barcode c# example Figure 10-9. Installed profiles in Objective-C

Creator Data Matrix 2d barcode in Objective-C Figure 10-9. Installed profiles

Figure 10-9. Installed profiles
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CHAPTER 10: iPhone
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You can click on each installed profile to view more information. In this interface, profiles can simply be imported certificates, and they can also be configurations created using the iPhone configuration utility, which has a dedicated section later in this chapter. Using this interface, you can remove any installed restrictions, provided you can provide the phones passcode when prompted. NOTE: As of this writing, the iPhone did not support the Secure/Multipurpose Internet Mail Extensions (SMIME) standard. Messages cannot be signed or encrypted on the phone even if the proper certificate bundle is installed.
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The iPhone and iPod touch both support connecting to standards compliant wireless access points and VPNs. The Wireless network settings can be configured to access a wireless network by opening the Settings application, typically found on the devices home screen. With settings open, tap on General button and then Network. Here, you will have access to configure VPN and Wi-Fi connectivity settings. By tapping on Wi-Fi, you will have options to turn Wi-Fi off completely, or to join a particular network from a presented list of found SSIDs. Select the appropriate network and then enter the required information to connect to it. Alternatively, if you want to connect to a hidden network, tap Other and then specify the SSID, security type, and credentials. This should be familiar because it is also how you would connect to the same type of network from within Mac OS X (see Figure 10-10).
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Figure 10-10. Configurewireless access
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CHAPTER 10: iPhone
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VPN support on the iPhone includes standard PPTP and L2TP clients. Additionally, you can also connect to a Cisco VPN, because a basic IPSec client built specifically for Cisco Group authentication is included. Oddly enough, this means that native VPN support on the iPhone is actually more robust than that provided by Mac OS X, as the latter has no built-in support for IPsec layer3 tunnels. To access the VPN settings on a device, tap on Settings from the home screen. Next, tap on General and then Network. You will now see Wi-Fi and VPN. Tap on VPN and then tap on the Add VPN Configuration button. From here you will see three tabs, L2TP, PPTP, and IPSec. If you are using any of these, then you more than likely already have a VPN server and configuration will closely resemble configuring VPN settings on any other platform. Configuration of the actual VPN server is outside of the purview of this book, so I will spare you the details about the differences between PPTP and L2TP or what a Group Name is for in IPSec. Enter the appropriate information for your organization and then select whether you want to encrypt all traffic through the VPN. If you do so, network connections will default over the virtual VPN interface. It is worth noting that VPN connections do not persist across different networks changes between 3g access and Wi-Fi require the VPN tunnel to be re-established (see Figure 10-11).
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Figure 10-11. Configure VPN
Non-Cisco, IPSec-based VPNs may or may not be supported. Check with your vendor to determine whether support is available. If it supports one of the aforementioned VPN protocols, you will most likely have minimal issues. Many vendors, such as CheckPoint,
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CHAPTER 10: iPhone
now have dedicated portals for their iPhone customers (http://www.checkpoint.com/ iphone). If your company uses a non-standard VPN technology, such as SSL, then I have some bad news for you. Due to the sandboxed nature of the iPhone software stack, this type of device-wide network control is not possible. Do not hold your breath for third party support of web/SSL-based VPN technologies, at least not until Apple announces some policy changes. NOTE: As of this writing, Apple officially supports Cisco ASA 550 Security and PIX Firewalls with software version 7.2 and later (version 8 recommended) and IOD version 12.4(15)T or later. VPN 3000 Series are not supported. Also, there was no auto connection functionality of the VPN client. Users must manually connect to the VPN. Keep this in mind for internal webbased applications or those custom applications that require internal resource access ( such as databases).
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