konfigurasi NAT

Juli 28, 2017

konfigurasi NAT

apa itu NAT ?

NAT adalah (Bahasa Inggris:Network Address Translation) adalah suatu metode untuk menghubungkan lebih dari satu komputer ke jaringan internet dengan menggunakan satu alamat IP. Banyaknya penggunaan metode ini disebabkan karena ketersediaan alamat IP yang terbatas, kebutuhan akan keamanan (security), dan kemudahan serta fleksibilitas dalam administrasi jaringan.

NAT adalah metode translasi IP private menjadi IP public. Agar dapat berkomunikasi dengan Internet kita harus teregistrasi menggunakan IP public.
Tujuan NAT

Mengurangi keterbatasan IPv4
Menyembunyikan skema network internal

Keterangan :

IP PUBLIC 202.100.100.100

Router 0 : Gig0/0 10.10.10.1/30
Gig0/1 192.168.10.1/24

Router 1 : Gig0/0 10.10.10.2/30
Gig0/1 192.168.20.1/24

Server : 192.168.20.2/24

PC0 : 192.168.10.2/24

PC1 : 192.168.10.3/24

Konfigurasi pada Router0

Router0>enable
Router0#conf ter
Enter configuration commands, one per line. End with CNTL/Z.
Router0(config)#int
Router0(config)#interface gi
Router0(config)#interface gigabitEthernet 0/0
Router0(config-if)#ip ad
Router0(config-if)#ip address 10.10.10.1 255.255.255.252
Router0(config-if)#no sh

Router0>enable
Router0#conf ter
Enter configuration commands, one per line. End with CNTL/Z.
Router0(config)#int
Router0(config)#interface gi
Router0(config)#interface gigabitEthernet 0/1
Router0(config-if)#ip ad
Router0(config-if)#ip address 192.168.10.1 255.255.255.0
Router0(config-if)#no sh

Router0(config-if)#exit

Router0(config)#ip route 0.0.0.0 0.0.0.0 10.10.10.2

Konfigurasi pada Router1

Router1>enable
Router1#conf ter
Enter configuration commands, one per line. End with CNTL/Z.
Router1(config)#int
Router1(config)#interface gi
Router1(config)#interface gigabitEthernet 0/0
Router1(config-if)#ip ad
Router1(config-if)#ip address 10.10.10.2 255.255.255.252
Router1(config-if)#no sh

Router1>enable
Router1#conf ter
Enter configuration commands, one per line. End with CNTL/Z.
Router1(config)#int
Router1(config)#interface gi
Router1(config)#interface gigabitEthernet 0/1
Router1(config-if)#ip ad
Router1(config-if)#ip address 192.168.20.1 255.255.255.0
Router1(config-if)#no sh
Router1(config-if)#exit

Router1(config)#ip route 0.0.0.0 0.0.0.0 10.10.10.1

Router1(config)#int

Router1(config)#interface gi 0/1
Router1(config-if)#ip na
Router1(config-if)#ip nat ins
Router1(config-if)#ip nat inside
Router1(config-if)#exit
Router1(config)#in
Router1(config)#interface gi
Router1(config)#interface gigabitEthernet 0/0
Router1(config-if)#ip na
Router1(config-if)#ip nat out
Router1(config-if)#ip nat outside
Router1(config-if)#exit
Router1(config)#ip na
Router1(config)#ip nat ins
Router1(config)#ip nat inside sour
Router1(config)#ip nat inside source st
Router1(config)#ip nat inside source static 192.168.20.2 202.100.100.100

Hasil Ping PC 0 ke IP PUBLIC 202.100.100.100