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MDI DHCP Server Implementation

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MDI DHCP Server Implementation:[edit]

OS Version RHEL 6.1 (x86_64)

ROOT Password : pipl?mdi161

To access DHCP server logged in on MDI mail server with public IP (credential is on login sheet): 

tetra@tetra004:~$ ssh root@14.141.218.163
root@14.141.218.163's password: "Type password"

Then access DHCP server from mail server: 

[root@mailserver ~]# ssh root@192.168.1.10
root@192.168.1.10's password: "Type password"

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]

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 192.168.13.1 192.168.24.254;
 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 864000;
 max-lease-time 1728000;
}

#Fixed address
host DESKTOP-NH2KCIO { hardware ethernet B6:86:87:B2:FD:EC ; fixed-address 192.168.17.228;}
host DESKTOP-NH3KCIO { hardware ethernet B0:5A:DA:D6:9C:7D ; fixed-address 192.168.13.202;}
host DESKTOP-NH1KCIO {hardware ethernet 44:8a:5b:72:53:b2 ; fixed-address 192.168.12.215;}
host Tarun_mobile {hardware ethernet 98:0c:a5:18:bc:bd ;}
deny unknown-clients;

# Unknown clients get this pool.
subnet 169.254.0.0 netmask 255.255.0.0 {
 option domain-name-servers ns1.example.com, ns2.example.com;
 max-lease-time 300;
 range 169.254.0.1 169.254.255.254;
 allow unknown-clients;
}
include "/mac_address/NMP28_MAC_Responses.txt";
include "/mac_address/PGPM_2014.txt";
include "/mac_address/PGPM_2015.txt";
include "/mac_address/PGPIM_2014.txt";
include "/mac_address/PGPIM_2015.txt";
include "/mac_address/sap_2016.txt";
include "/mac_address/fpm_2015.txt";
include "/mac_address/Vendor.txt";
include "/mac_address/PGHR_2015.txt";
include "/mac_address/PGHR_2014.txt";
include "/mac_address/Faculty_Staff_Hostel_LH_LAB.txt";
include "/mac_address/PTPGPM.txt";


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


Binding new MAC addresses.[edit]

[root@mdidhcpserver ~]# cd /mac_address
[root@mdidhcpserver mac_address]# ls -l
total 200
-rw-r--r-- 1 root root 42211 Mar 16 14:06 Faculty_Staff_Hostel_LH_LAB.txt
-rw-r--r-- 1 root root  3236 Mar 16 12:24 fpm_2015.txt
-rw-r--r-- 1 root root 17422 Mar 16 11:40 NMP28_MAC_Responses.txt
-rw-r--r-- 1 root root  6483 Mar  9 14:27 PGHR_2014.txt
-rw-r--r-- 1 root root  9809 Mar  9 14:21 PGHR_2015.txt
-rw-r--r-- 1 root root   867 Mar  9 11:08 PGPIM_2014.txt
-rw-r--r-- 1 root root  1501 Mar  9 11:02 PGPIM_2015.txt
-rw-r--r-- 1 root root 32881 Mar  8 15:56 PGPM_2014.txt
-rw-r--r-- 1 root root 50847 Mar 16 13:45 PGPM_2015.txt
-rw-r--r-- 1 root root  4616 Mar 16 13:22 PTPGPM.txt
-rw-r--r-- 1 root root   534 Mar  9 13:44 sap_2016.txt
-rw-r--r-- 1 root root   122 Mar 12 17:31 Vendor.txt

For example if client requested to add MAC address in Faculty and Staff department then open below file. 

[root@mdidhcpserver mac_address]# vim Faculty_Staff_Hostel_LH_LAB.txt

Make entry as below given formate. 

host 110_Kamal_Kishore-1 {hardware ethernet 00:16:E6:F6:E8:B1 ;}
host 111_Satya_Prakash-1 {hardware ethernet 00:16:E6:F6:BC:B7 ;}
host 111_Satya_Prakash-2 {hardware ethernet 14:f6:5a:ff:68:19 ;}
host 114_Ashok_Mishra-1 {hardware ethernet 00:16:E6:F6:BC:6E ;}
host 115_Tika_Bahadur-1 {hardware ethernet 00:01:6c:9d:33:d0 ;}
host 115_Tika_Bahadur-2 {hardware ethernet 78:45:C4:C3:DD:7C ;}
host 115_Tika_Bahadur-3 {hardware ethernet 9C:2A:70:C5:F2:F5 ;}
host 132_Charanjeet-4 {hardware ethernet 5C:F8:A1:97:11:D1 ;}
host 132_Charanjeet-5 {hardware ethernet 08:bd:45:66:03:3e ;}
host 135_Des_Raj-1 {hardware ethernet 8C:DC:D4:46:AF:9E ;}
host 136_Ashish_Kumar_Bose-1 {hardware ethernet 00:16:E6:21:4D:32 ;}
host 142_Lekh_Bahadur-1 {hardware ethernet 00:01:6C:9C:B1:12 ;}
host 143_R_P_Paswan-1 {hardware ethernet 00:01:6C:9C:A4:A1 ;}

Note: Duplicate entry will not be accepted you will get error while restarting dhcpd service.

Save file and restart dhcpd service: 

[root@mdidhcpserver ~]# /etc/init.d/dhcpd restart
 Shutting down dhcpd:                                       [  OK  ]
 Starting dhcpd:                                            [  OK  ]
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