CentOS6.5 install the dhcp server

CentOS6.5 install the dhcp server
CentOS6.5-dhcp Server Installation

Run the following command:

Setting: SELINUX

Set SELinux to permissive mode or disable it;

1. to modify the configuration file, restart the machine:

Modify the/etc/selinux/config file

Go to edit file:

Vi/etc/selinux/config

Change SELINUX = enforcing to SELINUX = disabled and restart the machine.

2. Add the port first:

Set firewall:

# Vi/etc/sysconfig/iptables

Add the following two rows:

AINPUT-mstate-stateNEW-mudp-pudp-dport67-jACCEPT

AINPUT-mstate-stateNEW-mudp-pudp-dport68-jACCEPT

Restart NIC:

/Etc/init. d/iptablesrestst

Formal installation of dhcp service:

1. DHCP Server installation purpose: the server controls the IP address range. When a client logs on to the server, it can automatically obtain the IP address and subnet mask allocated by the server.

2. Installation Method:

# Yuminstalldhcp

Edit the configuration file:

# Cp/usr/share/doc/dhcp-4.1.1/dhcpd. conf. sample/etc/dhcp/dhcpd. conf

Edit:

# Vi/etc/dhcp/dhcpd. conf

Ddns-update-styleinterim; # configure dynamic update mode with DHCP-DNS

Ignoreclient-updates; # ignore client updates

Subnet172.25.0.0netmask?=192.0 {# Scope

Optionrouters172.25.0.1; # router address (Gateway)

Optionsubnet-mask255.255.192.0; # subnet mask options

Optionnis-domain "ostv.org ";

Optiondomain-name "ostv.org"; # Domain name

Optiondomain-name-servers8.8.8.8; # DNS address

Optiontime-offset-18000; # Set the offset time for the Greenwich Mean Time for the client, in seconds

Rangedynamic-bootp172.25.0.100172.25.0.150; # lease IP address range

Default-lease-time21600; # default lease time

Max-lease-time43200; # Max lease time

}

Start the DHCPD service and view the Port:

There are two methods to start a service command:

First: #/etc/init. d/dhcpdstart

Type 2: # servicedhcpdstart

Note: Stop command

First: #/etc/init. d/dhcpdstop

Type 2: # servicedhcpdstop

Check whether startup is successful:

# Netstat-panu | grepdhc *

Note:

Disable SELinux before installing MySQL. The steps are as follows:

1. Disable SELinux and restart the system;

Check whether startup is successful:

# Netstat-panu | grepdhc *

Database File dhcpd. leases for customer lease

# Cat/var/lib/dhcpd. leases