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2. A remote access connection has been authenticated, the dial-in properties of the user account are set to Allow Access, and the first matching remote access policy is set to Grant Remote Access Permission. If the remote client still cannot successfully connect to the remote access server, what is the most likely explanation

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3 CC2E.COM/ 3012

Install Windows Server 2003 on the VPN server computer, connect it to either the Internet or to a perimeter network with one network adapter, and connect it to the intranet with another network adapter. Without running the Routing And Remote Access Server Setup Wizard, the VPN server computer will not forward Internet Pro tocol (IP) packets between the Internet and the intranet. This is because in its default configuration, a Windows Server 2003-based computer does not act as a router between Transmission Control Protocol/Internet Protocol (TCP/IP) subnets. The wizard will set up the routing connections between the interfaces for you, and handle some other complexities as well. For the connection connected to the Internet or the perimeter network, configure the TCP/IP protocol with a public IP address, a subnet mask, and the default gateway of either the firewall (if the firewall is located in a perimeter network) or an Internet service provider (ISP) router (if the VPN server is directly connected to the Internet and there is no firewall between the VPN server and the ISP router).

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If a remote access connection is successfully authenticated, the connection must be authorized before remote access can occur. Remote access authorization occurs in two stages: first, the dial-in properties of the user account are verified, and then the first matching remote access policy is applied to the connection. The dial-in properties of the user account include a remote access permission set ting that consists of three options: Allow Access, Deny Access, and Control Access Through Remote Access Policy. A remote access policy consists of a policy condition that describes the type of connection to which the policy is applied. Remote access policies are ordered, and only the first matching remote access policy is applied to a remote access con nection. Remote access policies include a grant or deny access permission setting that can be overridden by user account settings. Remote access policies also include a policy profile that applies various attributes to the connection, such as authentication requirements, encryption requirements, or packet filters. To enable access for clients beyond the remote access server, the remote access server must be enabled as a router, and the IP routing option must be enabled in the Routing And Remote Access server properties. You can manage remote access client connections through the Remote Access Cli ents node in the Routing And Remote Access console.

Glass, Robert L. Software Conflict: Essays on the Art and Science of Software Engineering. Englewood Cliffs, N.J.: Yourdon Press, 1991. The chapter titled Recommended: A Minimum Standard Software Toolset provides a thoughtful counterpoint to the more-tools-is-better view. Glass argues for the identification of a minimum set of tools that should be available to all developers and proposes a starting kit. Jones, Capers. Estimating Software Costs, New York: McGraw-Hill, 1998. Boehm, Barry, et al. Software Cost Estimation with Cocomo II, Reading, Mass.: Addison Wesley, 2000. Both the Jones and the Boehm books devote sections to the impact of tool use on productivity. Kernighan, Brian W., and P. J. Plauger. Software Tools. Reading, Mass.: Addison-Wesley, 1976. Kernighan, Brian W., and P. J. Plauger. Software Tools in Pascal. Reading, Mass.: Addison-Wesley, 1981. The two Kernighan and Plauger books cover the same ground the first in Rational Fortran, the second in Pascal. The books have two agendas and meet both nicely. The first is to give you the source code for a useful set of programming tools. The tools include a multiple-file finder, a multiple-file changer, a macro preprocessor, a diff tool, an editor, and a print utility. The second agenda is to expose you to good programming practices by showing you how each of the tools is developed. Both authors are expert programmers, and the books are full of design-decision rationales and analyses of trade-offs, adding up to rare and valuable insight into how experienced designers and programmers approach their work.

Figure 1-3

Caution Do not configure the Internet connection with DNS server or Windows Internet Name Service (WINS) server IP addresses. This is very important for the proper operation of the VPN server and clients it will be servicing we will explain why later in this chapter.