How To Install and Configure DHCP Server on CentOS 6.3

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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:kirtipatel.com
  • 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 kirtipatel.com";

 # 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


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