DHCP Server di Suse 10.0

images.jpg DHCP (Dynamic Host Configuration Protocol), merupakan salah satu mekanisme pemberian IP Address pada komputer host atau client secara otomatis. Mekanismenya adalah menggantikan peran administrator jaringan dalam,terutama saat memasukkan IP Address di setiap komputer Client.Prinsip kerjasanya kurang lebih adalah sebagai berikut, pada saat Server DHCP aktif, maka server DHCP menyediakan range IP pada kelas tertentu, sesuai dengan aturan yang ditetapkan oleh admin. Kemudian, pada saat komputer client yang terhubung ke jaringan aktif, sistem operasi akan mencari ke DHCP server, apakah ada IP yang bisa direservasi. Jika ada,maka Server DHCP akan memberikan IPtersebut.

Pada DHCP, lama waktu IP yang diberikan pada setiap komputer bisa dibuat dinamis, artinya setelah pada waktu tertentu, maka IP yang ada pada komputer client akan habis masa penggunaannya. Ini disebut lease IP. Ada juga yang sifatnya, IP tersebut tetap berada di komputer client, selama kartu jaringannya tidak rusak tentunya.
Berikut adalah konfigurasi DHCP server di linux. Distro yang digunakan
adalah Opensuse 10.0. Untuk mengkonfigurasinya, dibutuhkan priveledge
tertinggi, yaitu root.
#rpm -qa | grep dhcp
dhcpcd-1.3.22pl4-193
dhcp-server-3.0.1rc13-28
yast2-dhcp-server-2.9.16-5
dhcp-tools-1.6-25
dhcp-3.0.1rc13-28
setelah terinstall, langkah selanjutnya adalah mensetting dhcpd.conf
Untuk melihat settingan dhcp server user bisa ketikan vi /etc/dhcpd.conf

# dhcpd.conf
#
# Sample configuration file for ISC dhcpd
#
# option definitions common to all supported networks…
option domain-name “cahpati.com”;
option domain-name-servers 192.168.5.1;

default-lease-time 600;
max-lease-time 7200;
# if you do not use dynamical DNS updates:
#
# this statement is needed by dhcpd-3 needs at least this statement.
# you have to delete it for dhcpd-2, because it does not know it.
#
# if you want to use dynamical DNS updates, you should first read
# read /usr/share/doc/packages/dhcp-server/DDNS-howto.txt
ddns-update-style none;
ddns-updates off;

# If this DHCP server is the official DHCP server for the local
# network, the authoritative directive should be uncommented.
#authoritative;

# Use this to send dhcp log messages to a different log file (you also
# have to hack syslog.conf to complete the redirection).
log-facility local7;

# No service will be given on this subnet, but declaring it helps the
# DHCP server to understand the network topology.

subnet 192.168.1.0 netmask 255.255.255.0 {
option routers 192.168.5.1;
option subnet-mask 255.255.255.0;

# Ini buat pengunjung,mereka tinggal colok kabel ethernet aja.
# ===============================================================
range dynamic-bootp 192.168.1.10 192.168.1.40;

# Ini buat komputer yang sudah terdaftar di server DHCP
# =======================================
# Host Cahpati
# =======================================
# 1. komputer putri
host putri {
hardware ethernet 00:0A:E4:2E:84:D5;
fixed-address 192.168.1.20;
}
# 2. komputer fahmi
host fahmi {
harware ethernet 00:0A:F4:2E:87:D4;
fixed-address 192.168.1.21;
}

}

# This is a very basic subnet declaration.

#subnet 10.254.239.0 netmask 255.255.255.224 {
# range 10.254.239.10 10.254.239.20;
# option routers rtr-239-0-1.example.org, rtr-239-0-2.example.org;
#}

# This declaration allows BOOTP clients to get dynamic addresses,
# which we don’t really recommend.

#subnet 10.254.239.32 netmask 255.255.255.224 {
# range dynamic-bootp 10.254.239.40 10.254.239.60;
# option broadcast-address 10.254.239.31;
# option routers rtr-239-32-1.example.org;
#}

# A slightly different configuration for an internal subnet.
#subnet 10.5.5.0 netmask 255.255.255.224 {
# range 10.5.5.26 10.5.5.30;
# option domain-name-servers ns1.internal.example.org;
# option domain-name “internal.example.org”;
# option routers 10.5.5.1;
# option broadcast-address 10.5.5.31;
# default-lease-time 600;
# max-lease-time 7200;
#}

# Hosts which require special configuration options can be listed in
# host statements. If no address is specified, the address will be
# allocated dynamically (if possible), but the host-specific information
# will still come from the host declaration.

#host passacaglia {
# hardware ethernet 0:0:c0:5d:bd:95;
# filename “vmunix.passacaglia”;
# server-name “toccata.fugue.com”;
#}

# Fixed IP addresses can also be specified for hosts. These addresses
# should not also be listed as being available for dynamic assignment.
# Hosts for which fixed IP addresses have been specified can boot using
# BOOTP or DHCP. Hosts for which no fixed address is specified can only
# be booted with DHCP, unless there is an address range on the subnet
# to which a BOOTP client is connected which has the dynamic-bootp flag
# set.
#host fantasia {
# hardware ethernet 08:00:07:26:c0:a5;
# fixed-address fantasia.fugue.com;
#}

# You can declare a class of clients and then do address allocation
# based on that. The example below shows a case where all clients
# in a certain class get addresses on the 10.17.224/24 subnet, and all
# other clients get addresses on the 10.0.29/24 subnet.

#class “foo” {
# match if substring (option vendor-class-identifier, 0, 4) = “SUNW”;
#}

#shared-network 224-29 {
# subnet 10.17.224.0 netmask 255.255.255.0 {
# option routers rtr-224.example.org;
# }
# subnet 10.0.29.0 netmask 255.255.255.0 {
# option routers rtr-29.example.org;
# }
# pool {
# allow members of “foo”;
# range 10.17.224.10 10.17.224.250;
# }
# pool {
# deny members of “foo”;
# range 10.0.29.10 10.0.29.230;
# }
#}

setelah konfigurasi selesai, aktifkan daemon dhcp
# /etc/init.d/dhcpd start atau dhcpd start
Memulai dhcpd: [ OK ]

Untuk Melihat, apakah konfigurasi kita berjasil atau tidak, dhcpd mencatat
list client yang mendapat reservasi IP dari server, filenya bisa kita
lihat di :
/var/lib/dhcp/dhcpd.leases

sekian, selamat mencoba

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One Response

  1. wah boleh juga tapi gw ga tau cara install nya?

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