Red Flag asianux Server 3 User's Guide: DHCP server configuration

This section describes the graphical configuration tool--rfdhcp for DHCP servers, which you can use to http://www.aliyun.com/zixun/aggregation/13744.html "> Management Servers, shared networks, subnets, hosts, and groups." RFDHCP can configure most of the server's functionality. For features that are not supported by the Configuration tool, you can use the editor provided in the tool to manually edit DHCP profiles.

You need to run the RFDHCP Configuration tool under the KDE environment with root privileges.

The DHCP Configuration tool--rfdhcp can only be used to manage more than 3.0 versions of DHCPD services.

10.2.1 Manage DHCP servers

10.2.1.1 Open DHCP Configuration tool

You can start the Rfdhcp tool in the following ways:

In the tab of Control Panel, double-click DHCP Configuration tool;

In the System main menu, select "Management tools → system management →dhcp configuration Tool";

Type RFDHCP directly at the command line or at the shell prompt.

10.2.1.2 start and stop the DHCP service

Open the RFDHCP Configuration tool, and click the appropriate DHCP server in the console tree on the left side of the main window. To start the DHCP service, select "operations → all tasks → start" in the menu;

To stop the DHCP service, select "operations → all tasks → stop" in the menu, and to restart the DHCP service, select "operations → all tasks → start again" in the menu.

When you stop the server, the start option appears and you can click it to restore the service again.

You can also perform the start, stop, and restart tasks for a DHCP server by using the following command at the command line terminal:

#/ETC/RC.D/INIT.D/DHCPD Start

#/ETC/RC.D/INIT.D/DHCPD Stop

#/ETC/RC.D/INIT.D/DHCPD Restart

10.2.1.3 View DHCP server properties

Open the RFDHCP Configuration tool, and click the appropriate DHCP server in the console tree on the left side of the main window. Select action → Properties on the menu, open the DHCP Properties dialog box, and view or modify the properties of the server as needed.

Only network administrators can choose to authorize this server as authoritative on the network. If you are unsure of whether you have a network administrator, do not select the above option.

10.2.1.4 Authorize DHCP server

The DHCP server provides useful and planned management services when it is properly configured and authorized for use on the network. However, problems can occur when an incorrectly configured or unauthorized DHCP server is introduced to the network. For example, if an unauthorized DHCP server is started, it may begin leasing incorrect IP addresses for clients or denying DHCP clients attempting to update the current address lease.

Any of these configuration errors can cause more problems for DHCP-enabled clients. For example, a client that has never been authorized to obtain a configuration lease cannot find a valid domain controller, making it difficult for the client to successfully log on to the network. To avoid these problems, verify that the server is legitimate on the network before they provide services to the customer. This avoids most of the accidental damage caused by running an incorrect or properly configured DHCP server on the wrong network.

The authoritative DHCP server running on the network notifies the misconfigured DHCP client to update its configuration. If you want to specify a DHCP server as authoritative, in the server's Properties dialog box, select authorize this server as authoritative on the network.