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Setting Up DHCP
in a Small Office or Home

by Ralph Droms and Ted Lemon - May 30, 2000

Setting Up DHCP

Synopsis and Objectives


Small Office Network Architectures

Network Address Translation
Running a DHCP Server and Client on the Same Computer
Running the DHCP Server on Your Firewall
Problems with DSL Routers

Synopsis and Objectives

This tutorial describes how to set up basic Dynamic Host Configuration Protocol (DHCP) service for a smaller network, which may be connected to the Internet using an analog, Integrated Services Digital Network (ISDN), Digital Subscriber Line (DSL), or cable modem.

Seamless integration of DHCP service from an Internet service provider (ISP) and DHCP service on a local network can pose some specific problems. This tutorial addresses these problems. You will learn:

  • Configurations for small office networks
  • How to configure a DHCP server for a small office network
  • How to run a DHCP server on a firewall

The networks discussed in this tutorial are in a small office of some kind. Setting up a DHCP server for such an application isn't much different from setting one up for a large site. However, some of the things you might do to work around the limitations of a small networking environment could interact poorly with DHCP service. You might need the information in this tutorial if any of the following is true:

  • You are connected to your Internet service provider through a bridge, not a router (for example, with DSL or cable modem service).
  • You are running your DHCP server on the same computer you are using to do Internet Protocol (IP) network address translation between your office network and the Internet.
  • You are running your DHCP server on the same computer that you are using as a router or firewall between your network and the Internet.



Breaking News

One of the primary architects of OpenCable, Michael Adams, explains the key concepts of this initiative in his book OpenCable Architecture.

Expert Advice

Ralph Droms, Ph.D., author of The DHCP Handbook and chair of the IETF Dynamic Host Configuration Working Group, guides you to his top picks for reliable DHCP-related information.

Just Published

Residential Broadband, Second Edition
by George Abe

Introduces the topics surrounding high-speed networks to the home. It is written for anyone seeking a broad-based familiarity with the issues of residential broadband (RBB) including product developers, engineers, network designers, business people, professionals in legal and regulatory positions, and industry analysts.


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