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openSUSE 11.1 Reference Guide
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23.1 Configuring a DHCP Server with YaST


In this version of openSUSE, the YaST DHCP module can be set up to store the server configuration locally (on the host that runs the DHCP server) or to have its configuration data managed by an LDAP server. If you want to use LDAP, setup your LDAP environment before configuring the DHCP server.

The YaST DHCP module allows you to set up your own DHCP server for the local network. The module can run in simple mode or expert mode.

23.1.1 Initial Configuration (Wizard)

When the module is started for the first time, a wizard starts, prompting you to make a few basic decision concerning server administration. Completing this initial setup produces a very basic server configuration that should function in essential aspects. The expert mode can be used to deal with more advanced configuration tasks.

Card Selection

In the first step, YaST looks for the network interfaces available on your system then displays them in a list. From the list, select the interface on which the DHCP server should listen and click Add. After this, select Open Firewall for Selected Interfaces to open the firewall for this interface. See Figure 23-1.

Figure 23-1 DHCP Server: Card Selection

Global Settings

Use the check box to determine whether your DHCP settings should be automatically stored by an LDAP server. In the entry fields, provide the network specifics for all clients the DHCP server should manage. These specifics are the domain name, address of a time server, addresses of the primary and secondary name server, addresses of a print and a WINS server (for a mixed network with both Windows and Linux clients), gateway address, and lease time. See Figure 23-2.

Figure 23-2 DHCP Server: Global Settings

Dynamic DHCP

In this step, configure how dynamic IP addresses should be assigned to clients. To do so, specify an IP range from which the server can assign addresses to DHCP clients. All these addresses must be covered by the same netmask. Also specify the lease time during which a client may keep its IP address without needing to request an extension of the lease. Optionally, specify the maximum lease time—the period during which the server reserves an IP address for a particular client. See Figure 23-3.

Figure 23-3 DHCP Server: Dynamic DHCP

Finishing the Configuration and Setting the Start Mode

After the third part of the configuration wizard, a last dialog is shown in which you can define how the DHCP server should be started. Here, specify whether to start the DHCP server automatically when the system is booted or manually when needed (for example, for test purposes). Click Finish to complete the configuration of the server. See Figure 23-4.

Figure 23-4 DHCP Server: Start-Up

openSUSE 11.1 Reference Guide
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  Published under the terms fo the GNU General Public License Design by Interspire