Konfigurasi NAT Cisco Router

Ada beberapa metode (dan perintah) yang digunakan untuk mengkonfigurasi NAT. Tiga metode tersebut di antaranya Static NAT , Dynamic NAT, dan satu lagi TCP Load Balancing.

Static NAT Configuration

Topologi Static NAT

router#configure terminal
router(config)#ip nat inside source static local-ip global-ip [overload]
router(config)#interface interface-id
router(config-if)#ip nat inside
router(config-if)#interface interface-id
router(config-if)#ip nat outside
router(config-if)#end

Simpan pengaturan pada NVRAM

router#copy run start

Untuk melihat tabel NAT bisa menggunakan perintah berikut :

router#show ip nat translation

Dynamic NAT Configuration

Topologi Dynamic NAT

router#configure terminal
router(config)#ip nat pool pool-name start-ip end-ip {netmask netmask | prefix-length prefix-length}
router(config)#access-list access-list-number permit source [source-wildcard]
router(config)#ip nat inside source list access-list-number pool pool-name [overload]
router(config)#interface interface-id
router(config-if)#ip nat inside
router(config-if)#interface interface-id
router(config-if)#ip nat outside
router(config-if)#end

Simpan pengaturan pada NVRAM

router#copy run start

TCP Load Balancing Configuration

Topologi TCP Load Balancing Configuration

router#configure terminal
router(config)#ip nat pool pool-name start-ip end-ip {netmask netmask | prefix-length prefix-length} type rotary
router(config)#access-list access-list-number permit source [source-wildcard]
router(config)#ip nat inside destination-list access-list-number pool pool-name
router(config)#interface interface-id
router(config-if)#ip nat inside
router(config-if)#interface interface-id
router(config-if)#ip nat outside
router(config-if)#end

Simpan pengaturan pada NVRAM

router#copy run start