Ubuntu sebagai gateway internet

Aktifin root

# sudo passwd —enter (masukin pass sekarang, buat pass baru untuk root)
# su — enter (masukin pass root)

seting ip address, gunakan program editing kesayangan anda, disini saya pakai pico

root@ubuntu:~# pico /etc/network/interfaces

# The loopback network interface
auto lo
iface lo inet loopback

# Ethernet dari ISP
auto eth0
iface eth0 inet static
address 192.168.1.254
netmask 255.255.255.0
network 192.168.1.0
broadcast 192.168.1.255
gateway 192.168.1.1
# dns-* options are implemented by the resolvconf package, if installed
dns-nameservers 192.168.1.1

# Ethernet LAN (gateway)
auto eth1
iface eth1 inet static
address 192.168.0.1
netmask 255.255.255.0

Restart network

root@ubuntu:~# /etc/init.d/networking restart
* Reconfiguring network interfaces… [ OK ]

Lihat hasil dari configurasi ip address

root@ubuntu:~# ifconfig
eth0 Link encap:Ethernet HWaddr 00:0c:29:c9:2f:37
inet addr:192.168.1.254 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fec9:2f37/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:882 errors:0 dropped:0 overruns:0 frame:0
TX packets:314 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:95253 (93.0 KB) TX bytes:36154 (35.3 KB)
Interrupt:17 Base address:0×1400

eth1 Link encap:Ethernet HWaddr 00:0c:29:c9:2f:41
inet addr:192.168.0.1 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fec9:2f41/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:12 errors:0 dropped:0 overruns:0 frame:0
TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1378 (1.3 KB) TX bytes:328 (328.0 B)
Interrupt:18 Base address:0×1480

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
———————————————–

test ping ke geteway isp

root@ubuntu:~# ping 192.168.1.1
PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data.
64 bytes from 192.168.1.1: icmp_seq=1 ttl=64 time=0.655 ms
64 bytes from 192.168.1.1: icmp_seq=2 ttl=64 time=0.348 ms
64 bytes from 192.168.1.1: icmp_seq=3 ttl=64 time=0.335 ms
64 bytes from 192.168.1.1: icmp_seq=4 ttl=64 time=0.360 ms

ok. selesai

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