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By default, the Everyone group is granted only Read permissions on the root of the system drive, so sharing the root of the system drive is not sufficient for most remote administration tasks. Sharing the root of the system drive is not secure it essentially grants anyone who can connect to the computer access to system configuration information. For maximum security, it is recommended that you share folders only within your user profile, and share only information that you specifically want others to access.

the Internet, the firewall opens the necessary port to receive that information (such as TCP port 80 to receive a Web page). Once the information is received, the port is closed. Because ports do not remain open for long periods of time, a hacker has a difficult time finding an IP port on the computer that he or she can access.

The Shared Documents folder in My Documents is new in Windows XP Professional. This folder appears when two or more user accounts are created on the local computer. Files can be shared among multiple users of the same computer. In a network environment, files can be copied or moved to a folder on another computer. By default, the Shared Documents folder is automatically shared and made accessible to all other computers on the network.

Searching for files, folders, and network resources is easier in Windows XP Professional than in Windows 2000 Professional. You can perform a search from the Start menu, My Computer, My Documents, or My Network Places. As in Windows 2000 Professional, from My Network Places you can connect to shared folders, a Web folder, or an FTP site. In Windows XP Professional, using Windows Explorer is similar to using a Web browser. Forward and Back buttons, a History folder, an Address bar, custom views, and the Search Assistant are available in Windows Explorer windows and in all windows accessed by using My Computer, My Network Places, My Documents, and the Search command on the Start menu. When you use Windows XP Professional in an Active Directory domain, you can search the Active Directory directory service by specifying attributes for the resource you want. For example, you can search for printers capable of printing double-sided pages. For more information about searching in an Active Directory domain, see Searching for Network Resources in an Active Directory Environment later in this chapter.

Part II:

Network Address Translation (NAT)

Windows XP Professional offers a number of ways to find files or folders. Each method provides access to the History folder, Search Companion, and Indexing Service on the local computer. Users can search for files and folders in the following ways:

On the Start menu, point to Search, and then click Pictures, Music or Video, or Documents (word processing, spreadsheet, and so on), or All Files and Folders, or Printers, Computers or People. Open Windows Explorer. Open My Documents, My Computer, or My Network Places.

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NAT is often used in firewall solutions, especially in hardware-based residential gateways. NAT translates the local network s entire range of internal client IP addresses into a single external IP address in a different subnet, which is then used for Internet access. Any attacks launched against the external IP address will simply be ignored by the residential gateway s network router, which cannot be affected by many types of attacks that can affect computers, and the attacks will not be able to pass through the residential gateway and reach the computers, where it could do damage.

The Windows XP Professional History folder integrates Web links and network shares so that users have access to their navigation history no matter where they view the History folder. Users can sort the History folder by the following categories: By Date, By Site, By Most Visited, or By Order Visited Today. You can also select the History view from the toolbar in Windows Explorer, which tracks the history of all Web sites and documents opened. In this view, you can sort by location or by date used, or search the history list, using option buttons.

EFS in Windows XP Professional includes the following new features: