belajar DYNAMIC NAT

NAT (Network Address Translation) pada jaringan komputer berfungsisebagai translasi alamat IP public ke alamat IP private atau sebaliknya sehingga dengan adanya NAT ini setiap komputer pada jaringan LAN dapat mengakses internet dengan mudah.

Kita tahu bahwa alamat IP Public didunia ini sudah semakin menipis sehingga penggunaan dati NAT ini dirasa sangatlah efisien dan efektif terutama dalam alokasi alamat IP.

Dibawah ini adalah contoh topology DYNAMIC NAT :

 

Keterangan : 

Router1 : Gig0/0 200.200.10.1/30
               Gig0/1 10.10.10.1/24
Router2 : Gig0/0 192.168.10.1/24
               Gig0/1 10.10.10.2/24
Server    : 200.200.10.2/30
PC0       : 192.168.10.2/24
PC1       : 192.168.10.3/24

Konfigurasi pada Router 1 :

Router1>enable
Router1#conf ter
Router1(config)#int
Router1(config)#interface gi
Router1(config)#interface gigabitEthernet 0/0
Router1(config-if)#ip ad
Router1(config-if)#ip address 200.200.10.1 255.255.255.252
Router1(config-if)#no sh 
Router1>enable
Router1#conf ter
Router1(config)#int
Router1(config)#interface gi
Router1(config)#interface gigabitEthernet 0/1
Router1(config-if)#ip ad
Router1(config-if)#ip address 10.10.10.1 255.255.255.0
Router1(config-if)#no sh
Router1(config-if)#exit
Router(config)#ip route 0.0.0.0 0.0.0.0 10.10.10.2 Router(config)# 
Konfigurasi pada Router 2 :

Router2>enable
Router2#conf ter
Enter configuration commands, one per line.  End with CNTL/Z.
Router2(config)#int
Router2(config)#interface gi Router2(config)#interface gigabitEthernet 0/0 Router2(config-if)#ip ad Router2(config-if)#ip address 192.168.10.1 255.255.255.0 Router2(config-if)#no sh 
Router2>enable Router2#conf ter Enter configuration commands, one per line.  End with CNTL/Z. Router2(config)#int Router2(config)#interface giRouter2(config)#interface gigabitEthernet 0/1 Router2(config-if)#ip adRouter2(config-if)#ip address 10.10.10.2 255.255.255.0 Router2(config-if)#no sh Router2(config-if)#exit Router2(config)#ip route 0.0.0.0 0.0.0.0 10.10.10.1 Router2(config)#

 

Konfigurasi Nat : 

Router2(config)#int
Router2(config)#interface gi 0/0 
Router2(config-if)#ip na
Router2(config-if)#ip nat ins
Router2(config-if)#ip nat inside 

Router2(config-if)#exit
Router2(config)#interface gig 0/1
Router2(config-if)#ip na
Router2(config-if)#ip nat outs
Router2(config-if)#ip nat outside 
Router2(config-if)#ex
Router2(config)#ac
Router2(config)#access-list 1 per
Router2(config)#access-list 1 permit 192.168.10.0 0.0.0.255
Router2(config)#ip na
Router2(config)#ip nat poo
Router2(config)#ip nat pool poolR2 10.10.10.10 10.10.10.50 net
Router2(config)#ip nat pool poolR2 10.10.10.10 10.10.10.50 netmask 255.255.255.0 
Router2(config)#ip na
Router2(config)#ip nat ins
Router2(config)#ip nat inside sour
Router2(config)#ip nat inside source lis
Router2(config)#ip nat inside source list 1 pool poolR2
Router2(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