KONFIGURASI NAT

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.

 
contoh topology

 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
Router1(config)#




Coba Ping PC0 ke SERVER 200.200.10.2

              

Jika sudah reply seperti di atas maka konfigurasi telah berhasil


Lanjut Ping PC1 ke SERVER 200.200.10.2

           

       
Konfigurasi NAT Dynamic Overloading 

Router>en
Router#conf ter
Enter configuration commands, one per line.  End with CNTL/Z.
Router(config)#ip na
Router(config)#ip nat ins
Router(config)#ip nat inside sour
Router(config)#ip nat inside source lis
Router(config)#ip nat inside source list 1 pool poolR2 overl
Router(config)#ip nat inside source list 1 pool poolR2 overload
Router(config)#

Hasil Ping PC0 ke SERVER 200.200.10.2

 Hasil Ping PC1 ke SERVER 200.200.10.2