Network Services, Dhcp | Apple 10.3 manual

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Network Services

Mac OS X Server includes these network services for helping you manage Internet communications on your TCP/IP network:

•Dynamic Host Configuration Protocol (DHCP)

•Domain Name System (DNS)

•Firewall

•Network Address Translation (NAT)

•Virtual Private Network (VPN)

•Network time service

•IP failover

The network services administration guide provides complete information about all these services except IP failover, which is described in the command-line administration guide.

DHCP

DHCP helps you administer and distribute IP addresses dynamically to client computers from your server. From a block of IP addresses that you define, your server locates an unused address and “leases” it to client computers as needed. DHCP is especially useful when an organization has more clients than IP addresses. IP addresses are assigned on an as-needed basis, and when they are not needed they are available for use by other clients.

As you learned in “Search Policies” on page 31, you can automate the directory services setup of Mac OS X clients using your DHCP server’s Option 95 support. This recommended option lets client computers learn about their directory settings from a DHCP server.

DNS

DNS service lets users connect to a network resource, such as a web or file server, by specifying a host name (such as server.apple.com) rather than an IP address (such as192.168.11.12). DNS is a distributed database that maps IP addresses to domain names.

A server that provides DNS service keeps a list of names and the IP addresses associated with the names. When a computer needs to find the IP address for a name, it sends a message to the DNS server (also known as a name server). The name server looks up the IP address and sends it back to the computer. If the name server doesn’t have the IP address locally, it sends messages to other name servers on the Internet until the IP address is found.

You will use DNS if you use SMTP mail service or if you want to create subdomains within your primary domain. You will also use DNS if you are hosting multiple websites. If you don’t have an Internet service provider (ISP) who handles DNS for your network, you can set up a DNS server on your Mac OS X Server.

Chapter 2 Inside Mac OS X Server

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Apple 10.3 manual Network Services, Dhcp

Contents

Mac OS X Server Getting Started Apple Computer, Inc Apple Computer, Inc. All rights reserved Contents Server Administration Using the Administration ToolsComputers You Can Use to Administer a Server Setting Up an Administrator Computer Installation and Setup Overview Installing Server SoftwareLocal Installation From the Server Install Discs Remote Installation From the Server Install Discs Appendix a Appendix B Glossary Index Page What’s New in Version Superior Performance and Scalability Improved Setup, Management, and Monitoring Enhanced Network and Directory Services Improved Windows Integration New Workgroup and Desktop Management Features Part II Installation and Initial SetupWhat’s Included in This Guide Part I Introduction to Mac OS X Server Getting Additional Information This guide Tells you how to Preface About This Guide Page Part I Introduction to Mac OS X Server Page 1Mac OS X Server in Action Mac OS X Server addresses the needs of many environments Enterprise Organizations Workgroup servers Higher-Education Facilities Labs and Classrooms Directory server Small and Medium Businesses VPN Computational Clustering Applications Creative Businesses Web Service Providers Mac OS X Server in Action Core System Services 2Inside Mac OS X Server Using Apple Directories Open Directory Authentication Using Other DirectoriesSearch Policies Discovery of Network Services User ManagementSingle Signon User Accounts Group Accounts Home DirectoriesMacintosh User Management Preference Management System Image Services NetBootWindows User Management Mobile Accounts File Services Network Install Windows Services Apple File ServiceSharing Network File System NFS Service File Transfer Protocol FTP Print Service Web Service Mail Service Network Services Dhcp Firewall NAT Media Streaming and Broadcasting IP Failover Application Server Support Apache Tomcat JBoss Integrating Into Existing EnvironmentsWebObjects Server Administration High AvailabilityPage 3Server Administration Using the Administration Tools Computers You Can Use to Administer a Server Setting Up an Administrator Computer Using a Non-Mac OS X Computer for Administration Directory Access InstallerServer Assistant Opening and Authenticating in Workgroup Manager Workgroup Manager Using Workgroup Manager Server Administration Server Administration Opening and Authenticating in Server Admin Server AdminUsing Server Admin Server Administration Server Administration System Image Management Server Monitor Media Streaming Management Apple Remote Desktop Macintosh Manager Command-Line ToolsWorking With Version 10.2 Servers From Version 10.3 Servers Part II Installation and Initial Setup Page 4Installation and Setup Overview Planning Installing Server Software Local Installation From the Server Install Discs Remote Installation From the Server Install Discs Automating Server Installation With a Disk Image Initial Server Setup Setting Up Servers Interactively Welcome Automating Server Setup Using Setup Data Stored in a File Using Setup Data Stored in a Directory Then plug the iPod into the next server Using Encryption Setting Up Services Keeping Current Set Up a Planning Team 5Before You Begin Identify the Servers You’ll Need to Set Up Determine Services to Host on Each Server Define a Migration Strategy Define an Integration Strategy Define Physical Infrastructure Requirements Define Server Setup Infrastructure Requirements Make Sure Required Server Hardware Is Available Determine the Installation and Setup Strategy to UseCollect and Organize Information 6Installing Server Software Information You Need Upgrading From Version 10.1 or Preparing Disks for Installing Mac OS X Server Using Installer to Install Locally From the Install Discs Identifying Remote Servers When Installing Mac OS X ServerTo install server software locally To install to a remote server using the install discs Installing Server Software To install server software on your computer Automating Server Software Installation With a Disk ImageTo use installer to install server software Volumes/Mount Volumes/Mount1 Volumes/Mount02 Ssh root@ip address Installing Optional Server Software 7Initial Server Setup How a Server Searches for Saved Setup Data Saving Setup DataUsing Setup Data Saved in a File Initial Server Setup Using Setup Data Saved in a Directory Keeping Backup Copies of Saved Setup Data Specifying Initial Open Directory Usage Not Changing Directory Usage When Upgrading Setting Up a Server as a Standalone Server Setting Up a Server to Host an Open Directory Master Setting Up a Server to Connect to a Directory System Setting Up a Local Server Interactively Using Interactive Server SetupTo set up a local server interactively Setting Up a Remote Server Interactively Postponing Local Server Setups Following InstallationTo set up a remote server interactively Setting Up Multiple Remote Servers Interactively in a Batch To set up multiple remote servers interactively in a batch Initial Server Setup Using Automatic Server Setup Setting Up Servers Automatically Using Data Saved in a File To save and apply setup data in a file 102 To save and apply setup data in a directory record 104 105 Determining the Status of Setups Setting Up Open Directory Setting Up User Management Setting Up File ServicesTo set up a user account To set up file sharing Setting Up Print Service Setting Up Web ServiceTo set up a shared printer queue To turn on web service if it’s not running Setting Up Mail Service Setting Up Network ServicesSetting Up System Image Services Setting Up Media Streaming and Broadcasting Setting Up an Application Server To turn on JBoss if it’s not running Mac OS X Server Worksheet Appendix Disk format Computer name 114 Time zone Network interface data for this server is in the table below Appendix a Mac OS X Server Worksheet 118 BSetup Example Mac OS X Server in a Small Business Set up the network How to Set Up the ServerSet up the server and the master directory 121 Set up the firewall Set up DNS service Set up Dhcp service Set up NAT service Set up VPN service Set up productivity services Create user accounts and home directories Configure client computers Glossary Glossary Directory node See directory domain 129 Long name See user name Name server See DNS Domain Name System Realm See WebDAV realm Search path See search policy 133 134 135 Page Index 138 139