MDI DHCP Server Implementation

MDI DHCP Server Implementation:

OS Version RHEL 6.1 (x86_64)

ROOT Password : ghL@#W01GS

Set the hostname

[root@mdidhcpserver dhcp]# vim /etc/sysconfig/network

NETWORKING=yes
HOSTNAME=mdidhcpserver

Set IP address

[root@mdidhcpserver dhcp]# vim /etc/sysconfig/network-scripts/ifcfg-eth0

DEVICE=eth0
HWADDR=ec:b1:d7:3c:10:07
NM_CONTROLLED=no
ONBOOT=yes
IPADDR=192.168.1.10
NETMASK=255.255.0.0
GATEWAY=192.168.12.25
TYPE=Ethernet
BOOTPROTO=none
IPV6INIT=no
USERCTL=no

Restart network service:

[root@mdidhcpserver dhcp]# /etc/init.d/network restart
[root@mdidhcpserver dhcp]# chkconfig network on
[root@mdidhcpserver dhcp]# service NetworkManager stop
[root@mdidhcpserver dhcp]# chkconfig NetworkManager off

Flush the firewall rules:

[root@mdidhcpserver dhcp]# iptables -F
[root@mdidhcpserver dhcp]# service iptables stop
[root@mdidhcpserver dhcp]# chkconfig iptables off

Disable the selinux:

[root@mdidhcpserver dhcp]# setenforce 0

Disable selinux from file:

[root@mdidhcpserver dhcp]# vim /etc/sysconfig/selinux

 #This file controls the state of SELinux on the system.
 #SELINUX= can take one of these three values:
 #enforcing - SELinux security policy is enforced.
 #permissive - SELinux prints warnings instead of enforcing.
 #disabled - No SELinux policy is loaded.
SELINUX=disabled
 #SELINUXTYPE= can take one of these two values:
 #targeted - Targeted processes are protected,
 #mls - Multi Level Security protection.
SELINUXTYPE=targeted

Install DHCP package

rpm -ivh dhcp-4.1.1-19.P1.el6.x86_64.rpm

Configuring DHCP Server

Edit configuration file and make below entries

[root@mdidhcpserver dhcp]# vim /etc/dhcp/dhcpd.conf

# DHCP Server Configuration file.
#   see /usr/share/doc/dhcp*/dhcpd.conf.sample
#   see 'man 5 dhcpd.conf'
log-facility local5;
authoritative;
subnet 192.168.0.0 netmask 255.255.0.0 {
range 192.168.13.1 192.168.22.254;
option domain-name-servers 192.168.10.83, 192.168.12.25;
option domain-name "mdi.ac.in";
option routers 192.168.12.25;
option broadcast-address 192.168.15.255;
default-lease-time 43200;
max-lease-time 86400;
}
#MAC binding for host
host DESKTOP-NH1KCIO {
hardware ethernet 44:8a:5b:72:53:b2;
fixed-address 192.168.12.215;
#  filename "vmunix.passacaglia";
#  server-name "toccata.fugue.com";
}

Assign the network interface:

[root@mdidhcpserver ~]# vim /etc/sysconfig/dhcpd

Make below entry:

DHCPDARGS=eth0

After configuration Restart DHCP Service

[root@mdidhcpserver ~]# /etc/init.d/dhcpd restart
[root@mdidhcpserver ~]# chkconfig dhcpd on

Disable dhcpd6 service

[root@mdidhcpserver dhcp]# /etc/init.d/dhcpd6 stop
[root@mdidhcpserver dhcp]# chkconfig dhcpd6 off

Enabling log

[root@mdidhcpserver ~]# vim /etc/rsyslog.conf

Make below entry in rsyslog.conf file

# Save DHCP log
local5.*                                                    /var/log/dhcpd.log

Restart rsyslog service

[root@mdidhcpserver ~]# /etc/init.d/rsyslog status
rsyslogd (pid  1349) is running...
[root@mdidhcpserver ~]# /etc/init.d/rsyslog restart