dhcp服务器详解（Detailed description of DHCP server）.doc

dhcp服务器详解(Detailed description of DHCP server)
Detailed DHCP server plete security Linux
Released in 9358 [font: 2005-06-01 read medium]
Author: San Cao Jianghua
DHCP is a dynamic host configuration protocol. This protocol is used to automatically provide the IP address to puter, mask and routing information. work administrator is usually assigned a range of IP addresses to clients on a lan. When the device is connected to the LAN, they can request a IP address to the DHCP server. Then the DHCP server to assign an address for each request until the end equipment, distribution of all IP addresses in the range. The assigned IP address must be regularly to extend the loan period. This extension is called leasing, to ensure that before the client device to release the IP address in the normal suddenly disconnected from work when the assigned address can be returned to the server. This paper takes Redhat Linux 9 as an example, introduces how to establish plete and secure DHCP server.
To establish a DHCP server configuration file
You can use the Redhat Linux 9 with its own RPM package is installed. After installation, the DHCP daemon dhcpd configuration file in the /etc directory is a file named . The hand built /etc/ file. /etc/ usually includes three parts: parameters, declarations, option.
The configuration file in parameters (parameters): shows how to perform a task, whether to perform a task, or what will be sent to the work configuration options. The main contents are shown in Table 1
Parameter
Explain
Ddns-update-style
Interactive mode update configuration DHCP-DNS.
Default-lease-time
Specify the length of time is rental, in seconds.
Max-lease-time
Specifies the maximum length of time is the second unit rental.
Hardware
The work interface type and MAC address.
Server-name
Notify the DHCP client server name.
Get-lease-hostnames flag
Check the client IP address.
Fixed-address IP
The client is assigned to a