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Permissions for installing printers. To install a local printer in Windows XP Professional, you must belong to the Power Users or Administrators group and have the Load/ Unload Device Driver privilege. Administrators have this privilege by default, but it must be explicitly granted to Power Users. Blank password restriction. To protect users who do not password-protect their accounts, Windows XP Professional accounts without passwords can be used only to log on at the physical computer console and not remotely over the network.

5 On the Devices For Incoming Connections page, select the modem or broadband device you want to use to allow incoming connections. Click Next.

The following are among the new security-related features in Windows XP Professional:

5: Using Rapid Application Development Tools with Visual C# 2008

Software Restriction policies. New security policy options allow you to prevent certain software applications from running based on a file path, Internet zone, certificate, or hashed file path. Fast user switching.

6 Select Allow Virtual Private Connections and click Next. 7 On the User Permissions page, select the local user accounts that are allowed

On computers running Windows XP Professional that are not connected to a domain, users can switch from one user account to another without logging off or closing their applications.

Stored user names and passwords. This utility provides secure storage for user names and credentials needed to access network or Internet resources. New service accounts. Windows XP Professional includes two new service accounts, LocalService and NetworkService, to enable graduated levels of permissions on services. Services can run as LocalService on the local computer, as NetworkService on the network, or as part of the Local System. Any service not running as one of the three builtin service accounts must have its own account. Password Reset Wizard. This wizard makes it possible for users to create a secure reset disk, which they can use at a later date in case they forget the password for their local account.

For more information about these features and changes, see the applicable discussions in this chapter, and see 17, Managing Authorization and Access Control, and 18, Using Encrypting File System.

to connect to the computer via a VPN connection. If a user account on the local computer does not exist for the client, click Add to create one. Click Next.

SP2 makes significant changes in Windows XP to improve the overall security of the operating system. The changes are in four basic areas:

Improved network protection Improved memory protection Improved e-mail security Improved browser security

Part III:

uninstall, the mix of networking software that can be used over the incoming VPN connection. Click Next and then click Finish.

Windows XP SP2 includes the new Windows Firewall, covered in 22. This firewall is enabled by default and includes boot time security, protecting against a broad range of exploits. In addition to the new Windows Firewall, there are security enhancements in the Distributed Component Object Model (DCOM), the TCP/IP stack, the Remote Procedure Call (RPC) interface, Windows Messenger, and Windows Media Player. Finally, there are extensive changes to wireless networking in SP2 that are detailed in 21, Wireless Networking.

Windows XP SP2 adds support for both hardware- and software-enforced Data Execution Protection (DEP). Hardware DEP requires processor support. Software DEP uses an additional set of security checks designed to mitigate exploitation of exception-handling mechanisms in Windows. Applications can be written to use Safe Structured Exception Handling (SafeSEH), which allows their exception handler to be registered. Applications that do not use SafeSEH must ensure that their exception handler is located within a memory region marked as executable.