How To Install and Configure DHCP Server on CentOS 6.3

Synopsis:

A short tutorial on how to Install and Configure a DHCP Server on CentOS 6.3 x64, listening on the "eth0" Interface only.

Assumptions and Prerequisites:

• OS: CentOS 6.3 x64.
• Server Name: mujahid
• DNS IP: 192.168.1.10
• IPv6 is disabled.
• SELinux is disabled.
• Firewall (IPTables) is disabled.
• Subnet: 192.168.1.0/24
• Domain: houseofjaleel.com.au
• Gateway (Router IP Address): 192.168.1.1
• Text Editor: Nano
• Dynamic DNS (DDNS) is not enabled.

Step-by-Step Instructions:

1. Install the DHCP Package via a terminal.
# yum -y install dhcp

2. Edit file /etc/dhcp/dhcpd.conf with "nano" editor and write the following configuration:


# DHCP Server Configuration file.
#   see /usr/share/doc/dhcp*/dhcpd.conf.sample
#   see 'man 5 dhcpd.conf'
#


# This DHCP server to be declared valid
authoritative;

# Subnet 192.168.1.0/24
subnet 192.168.1.0 netmask 255.255.255.0 {

# default gateway
option routers 192.168.1.1;

# domain name
option domain-name "houseofjaleel.com.au";

# DNS's hostname or IP address
option domain-name-servers 192.168.1.10;

# range of lease IP address
range dynamic-bootp 192.168.1.2 192.168.1.254;

# default lease time
default-lease-time 600;

# max lease time
max-lease-time 7200;

# broadcast address
option broadcast-address 192.168.1.255;

##### Reserved Hosts #####

# Router
host router {
hardware ethernet xx:xx:xx:xx:xx:xx;
fixed-address 192.168.1.1;
}

# Farooq
host farooq {
hardware ethernet xx:xx:xx:xx:xx:xx;
fixed-address 192.168.1.10;
}

# Tariq
host tariq {
hardware ethernet xx:xx:xx:xx:xx:xx;
fixed-address 192.168.1.11
}

# Humaira
host humaira {
hardware ethernet xx:xx:xx:xx:xx:xx;
fixed-address 192.168.1.12;
}

# Khalid
host khalid {
hardware ethernet xx:xx:xx:xx:xx:xx;
fixed-address 192.168.1.13;
}

# Asim
host asim{
hardware ethernet xx:xx:xx:xx:xx:xx;
fixed-address 192.168.1.14;
}

# Mujahid
host mujahid{
hardware ethernet xx:xx:xx:xx:xx:xx;
fixed-address 192.168.1.15;
}

# Amir
host amir{
hardware ethernet xx:xx:xx:xx:xx:xx;
fixed-address 192.168.1.16;
}

# Muneera
host muneera{
hardware ethernet xx:xx:xx:xx:xx:xx;
fixed-address 192.168.1.17;
}

# Atif
host atif{
hardware ethernet xx:xx:xx:xx:xx:xx;
fixed-address 192.168.1.18;
}

} # end of Subnet 192.168.1.0/24

3. edit file /etc/sysconfig/dhcp to make sure the DHCP service is listening on the relevant Interface (eth0).

# nano /etc/sysconfig/dhcp

eg.

DHCPDARGS="eth0"  

4. Start DHCP at boot.

# chkconfig dhcpd on

5. Start the DHCP service.

# /etc/rc.d/init.d/dhcpd start