Chapter3.Building Connectivity

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Chapter 3. Building Connectivity

Refer to the following sections for information about these topics:

  • 3-1: Configuring Interfaces Discusses how you can configure firewall interfaces to join and communicate on a network. Physical, trunk, and logical interfaces are covered, as well as priority queue operation.

  • 3-2: Configuring Routing Explains the configuration steps needed to define static routes on a firewall, as well as the RIP and OSPF dynamic routing protocols.

  • 3-3: DHCP Server Functions Provides information about how a firewall can operate as a DHCP server and a DHCP client. These functions support dynamic addressing for the firewall and for internal hosts, without the use of a dedicated DHCP server.

  • 3-4: Multicast Support Presents the configuration steps needed to allow a firewall to forward multicast traffic in a secure manner and to participate in multicast routing.

A firewall must be configured with enough information to begin accepting and forwarding traffic before it can begin doing its job of securing networks. Each of its interfaces must be configured to interoperate with other network equipment and to participate in the IP protocol suite.

A firewall must also know how to reach other subnets and networks located outside its immediate surroundings. You can configure a firewall to use static routing information or information exchanged dynamically with other routers. You can even configure a firewall to handle IP multicast traffic, either as a proxy or as a multicast router.

You can also configure a firewall to provide various DHCP services so that hosts connected to its interfaces can get their IP addresses dynamically.

This chapter discusses each of these topics in detail.

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    Cisco ASA and PIX Firewall Handbook
    CCNP BCMSN Exam Certification Guide (3rd Edition)
    ISBN: 1587051583
    EAN: 2147483647
    Year: 2003
    Pages: 120
    Authors: David Hucaby

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