Merendahlah,
engkau kan seperti bintang-gemintang.....
Berkilau di pandang orang Diatas riak air
dan sang bintang nun jauh tinggi....
Janganlah seperti asap
Yang mengangkat diri tinggi di langit
Padahal dirinya rendah-hina
(Ust. Rahmat Abdullah, Allahu yarham.....)
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Untuk membuat ip secondary, perhatikan step-step berikut.
cp /etc/sysconfig/network-scripts/ifcfg-eth0 /etc/sysconfig/network-scripts/ifcfg-eth0:1
vi /etc/sysconfig/network-scripts/ifcfg-eth0:1
DEVICE:eth0:1 (telah di-rename menjadi eth0:1)
BOOTPROTO:static
IPADDR:192.168.0.XX
dan seterusnya…
setelah itu save !
service network restart
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SUbnetting
==========
Merampingkan jaringan yang besar menjadi jaringan yang lebih kecil.
mis.
anda adlaah network engineer PT. IB. anda dimintai oleh bos untuk memisssahkan jaringan yang ada menjadi 2 buah jaringan yang terpisah yang dihubungkan dengan router.
IP yang digunakan 192.168.200.x, berapa ip maskin yang digunakan, ip network, ip broadcast & range host tiap jaringan ?
+++++++++++++++++ +++++++++++++++++
+ + +
+ + +
R1 +++++++++++++ Router/GW ++++++++++++++++ R2 +
+ + +
+ + +
+++++++++++++++++ +++++++++++++++++
1. dibagi 2 => 256:2 = 128
2. Ip Masking => 256-128 = 128 => 255.255.255.1218
3. Tabel
=========================================================
Ruang IP Network IP Broadcst Range Host
=========================================================
1 192.168.1.0 192.168.1.127 192.168.1.1-126
2 192.168.1.128 192.168.1.255 192.168.1.129-254
=========================================================
Konfigurasi Jaringan di LINUX
==============================
a. Setting IP address
~ ifconfig
syntax : ifconfig device ip_address netmask
mis : ifconfig eth0 192.168.1.20
sifatnya sementara
~ edit file /etc/sysconfig/network-scipts/ifcfg-eth
device=eth0
bootpro=static (bisa static atau DHCP)
ipaddress=192.168.1.20
netmassk=255.255.255.0
gateway=192.168.1.1
onboot=yes
contoh lain :
DEVICE=eth0
BOOTPROTO=static
IPADDR=192.168.1.13
NETMASK=255.255.255.0
GATEWAY=192.168.1.1
ONBOOT=yes
METRIC=10
MII_NOT_SUPPORTED=no
USERCTL=no
MS_DNS1=202.134.2.5
MS_DNS2=192.168.1.1
RESOLV_MODS=yes
IPV6INIT=no
IPV6TO4INIT=no
~ mcc/drakconf
b.setting gateway
~ route (temporaary)
melihat routing
route -n
konfigurasi routing default gateway
syntax : route add default gw ip_gateway
misal : route add default gw 192.168.1.1
route del default gw 192.168.1.1 (untuk mengahapus)
~ edit file /etc/sysconfig/network
gateway=192.168.1.1
~ mcc/drakconf
menjalankan network
service network start
/etc/init.d/network start
mematikan network
service network stop
me-restart network
service network restart
c. Setting default DNS
~ edit file /etc/resolv.conf
nameserver 192.168.1.1
nameserver 202.134.2.5
~ mcc / drackconf
Sharing internet via Modem dial-up
====================================
—-modem dial——- PC eth0 192.168.2.1/24 kosongkan gw dan dns ——– LAN 192.168.2.x/24
A. Setting Server
~ Mendeteksi modem
a. wvdial
wvdialconf /etc/wvdial.conf >>> query modem
edit file /etc/wvdial.cof
PROVIDER=telkomnet
PHONENUMBER=080989999
USERNAME=telkomnet@instant
PASSWORD=telkom
menjalankan
ketik # wvdial
- setting ip forward
edit file /etc/sysctl.conf
ubah menjadi
net.ipv4.ip_forward=1
simpan
jalankan
sysctl -p
- setting masquerade
iptables -t nat -A POSTROUTING -s 192.168.2.0/24 -j masquerade -o ppp0
SHARING INTERNET VIA ETHERNET
=============================
—– modem adsl 192.168.1.1 ———– eth0 192.168.1.2 PC eth 192.168.200.1 ——- LAN 192.168.200.x/24 gw:192.168.200.1 dns:202.153.31.18
pada konsepnya sama
- setting ip forward
edit file /etc/sysctl.conf
ubah menjadi
net.ipv4.ip_forward=1
simpan
jalankan
sysctl -p
- setting masquerade
iptables -t nat -A POSTROUTING -s 192.168.2.0/24 -j masquerade -o eth0
