Cara Install Dan Konfigurasi DHCP Server di Centos 5.6

Install DHCP Server

yum install dhcp

Menuju alamat konfigurasi dasar dhcpd server 

cd /usr/share/doc/dhcp-tergantungversi/

Cek isi dalemnya apa, cuma cek aja ga diapa-apa-in koq

# nano dhcpd.conf.sample

ddns-update-style interim;

ignore client-updates;

subnet 192.168.0.0 netmask 255.255.255.0 {

# — default gateway

        option routers                  192.168.0.1;

        option subnet-mask              255.255.255.0;

        option nis-domain               "domain.org";

        option domain-name              "domain.org";

        option domain-name-servers      192.168.1.1;

        option time-offset              -18000; # Eastern Standard Time

#       option ntp-servers              192.168.1.1;

#       option netbios-name-servers     192.168.1.1;

# — Selects point-to-point node (default is hybrid). Don't change this unless

# — you understand Netbios very well

#       option netbios-node-type 2;

        range dynamic-bootp 192.168.0.128 192.168.0.254;

        default-lease-time 21600;

        max-lease-time 43200;

        # we want the nameserver to appear at a fixed address

        host ns {

                next-server marvin.redhat.com;

                hardware ethernet 12:34:56:78:AB:CD;

                fixed-address 207.175.42.254;

        }

}

Backup settingan default, jadi kalo ada apa-apa gampang nyarinya

# mv /etc/dhcpd.conf /etc/dhcpd.conf.old

Salin dulu dari settingan dasar yang kita cek doang tadi ke file asli, jadi gampang ngeditnya



# cp /usr/share/doc/dhcp-tergantungversi/dhcpd.conf.sample /etc/dhcpd.conf

Konfigurasi settingan dhcp.conf sesuai kehendak kita (admin jaringan).

# nano /etc/dhcpd.conf

ddns-update-style none; # keep it simple for now

ignore client-updates;  # here too

DHCPARGS=eth0;          # tells it what interface to listen on

subnet 192.168.1.0 netmask 255.255.255.0 {

# — default gateway

       option routers                  192.168.1.252;   # gateway on your eth0 internal interface

       option subnet-mask              255.255.255.0; # subnet mask

       option domain-name              "frastuzi-affan.com";  # domain name given to client

       option domain-name-servers      192.168.1.1, 202.134.0.155, 8.8.4.4;  #the IP of your ISP's nameservers you're 

#using

       option time-offset              -18000;        # Eastern Standard Time – set to what you have

       range 192.168.1.128 192.168.1.253;             # the range of IP's your clients will get

       default-lease-time 21600;                      # how long the client's will keep the same IP

       max-lease-time 43200;

       # we want the nameserver to appear at a fixed address

       host ns {

               next-server ns1.ispserver.net;         # change to your ISP's nameservers

               hardware ethernet 00:09:5B:8E:05:67;   # hardware MAC

               fixed-address 209.242.10.10;           # your ISP's nameserver IP

      }

 host frastuzi {

               #next-server ns1.ispserver.net;         # change to your PC's nameservers

               hardware ethernet 00:0c:29:a6:3c:0e;   # hardware MAC

               fixed-address 192.168.1.2;             # your PC's nameserver IP

      }

}

Alamat log dhcp ada di 

# tail -f /var/log/messages

Tes apakah konfigurasi DHCP Server sudah benar, kalau ada tulisan " Syntax: OK " maka dapat dipastikan sudah benar

# service dhcpd configtest

Jalankan DHCP Server agar client mendapatkan IP secara otomatis

# service dhcpd restart

Edit Alamat IP eth0

# nano /etc/sysconfig/network-scripts/ifcfg-eth0

DEVICE=eth0

BOOTPROTO=static

ONBOOT=yes

IPADDR=192.168.1.1

NETMASK=255.255.255.0

GATEWAY=10.1.10.43

Restart Networking agar perubahan diatas dapat langsung masuk ke sistem

# /etc/init.d/network restart

Coba cek apakah benar alamat IP sudah berubah menjadi 192.168.1.1

# ifconfig

Agar semua client dapat broadcast dhcp dari server

# route add -host 255.255.255.255 dev eth0

Konfigurasi GUI Firewall, Networking, dll di Centos

# setup

Ini dibutuhkan kalo punya 2 Lan Card, eth0 yang terhubung ke NAT dan sebagai pemberi DHCP untuk client, lalu mau di terusin ke eth1 yang terkoneksi dengan internet. Jadi client juga bisa internet-an

iptables -t nat -A POSTROUTING -o eth1 -j MASQUERADE

service iptables save

service iptables restart

echo 1 > /proc/sys/net/ipv4/ip_forward

/etc/sysconfig/network: FORWARD_IPV4=YES

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