5.3 DIAGNOSE AND RESOLVE ISSUES RELATED TO CLIENT CONFIGURATION. 5...

2.5.3 Diagnose and resolve issues related to client configuration.

Introduction

In the preceding chapter, you learned about the TCP/IP protocols and how to set up aTCP/IP infrastructure. One of the biggest advantages of TCP/IP as a network and trans-port protocol stack is its capability to route packets between different networks or subnets.Dealing with routing issues is an important part of the job of a Windows Server 2003 net-work administrator for a typical medium-to-large size network. In this chapter, we firstreview the basics of IP routing, including the role of routing tables, static and dynamicrouting, and routing protocols such as Routing Information Protocol (RIP) and OpenShortest Path First (OSPF).You’ll learn to use the netsh commands related to routing, and then we’ll show youhow to evaluate routing options.This includes selecting the proper connectivity devices;we’ll discuss hubs, bridges, switches (Layer 2, 3, and 4 varieties), and routers.We’ll look athow you can use a Windows Server 2003 machine as a router, and how to configure theRouting and Remote Access Service (RRAS) to do so.Next, we look at security considerations related to routing.We’ll show you how to ana-lyze requirements for routing components from a security-conscious point of view, andwe’ll discuss methods of simplifying the network topology to provide fewer attack points.This includes minimizing the number of network interfaces, the number of routes, and thenumber of routing protocols.We will also discuss router-to-router virtual private networks(VPNs), packet filtering, firewalls, and logging levels.Finally, we cover how to troubleshoot IP routing issues.We’ll identify troubleshootingtools and take a look at some common routing problems, including those related to inter-face configuration, RRAS configuration, routing protocols,TCP/IP configuration, androuting table configuration.

Understanding IP Routing

EXAM