Configuring Dhcp, Ddns, And Wccp Services; Configuring A Dhcp Server - Cisco PIX 500 Series Configuration Manual

Security appliance command line

Hide thumbs Also See for PIX 500 Series:

Table of Contents

Configuring DHCP, DDNS, and WCCP Services

This chapter describes how to configure the DHCP server, dynamic DNS (DDNS) update methods, and

WCCP on the security appliance. DHCP provides network configuration parameters, such as IP

addresses, to DHCP clients. The security appliance can provide a DHCP server or DHCP relay services

to DHCP clients attached to security appliance interfaces. The DHCP server provides network

configuration parameters directly to DHCP clients. DHCP relay passes DHCP requests received on one

interface to an external DHCP server located behind a different interface.

DDNS update integrates DNS with DHCP. The two protocols are complementary: DHCP centralizes and

automates IP address allocation; DDNS update automatically records the association between assigned

addresses and hostnames at pre-defined intervals. DDNS allows frequently changing address-hostname

associations to be updated frequently. Mobile hosts, for example, can then move freely on a network

without user or administrator intervention. DDNS provides the necessary dynamic updating and

synchronizing of the name to address and address to name mappings on the DNS server.

WCCP specifies interactions between one or more routers, Layer 3 switches, or security appliances and

one or more web caches. The feature transparently redirects selected types of traffic to a group of web

cache engines to optimize resource usage and lower response times.

This chapter includes the following sections:

This section describes how to configure DHCP server provided by the security appliance. This section

includes the following topics:

Configuring a DHCP Server, page 10-1

Configuring DHCP Relay Services, page 10-5

Configuring Dynamic DNS, page 10-6

Configuring Web Cache Services Using WCCP, page 10-9

Enabling the DHCP Server, page 10-2

Configuring DHCP Options, page 10-3

Using Cisco IP Phones with a DHCP Server, page 10-4

C H A P T E R

Cisco Security Appliance Command Line Configuration Guide

Asa 5500 series