Tarmoq xavfsizligi

Dynamic Address Translation

Dinamik NAT - ro'yxatdan o'tmagan IP manzilni ro'yxatdan o'tgan IP-manzillar guruhiga translatsiya qilishdan iborat.
Dinamik NAT ning Statik NAT dan farqi shuki, bu yerda bir nechta xususiy (Private) adresga bir nechta ommaviy (public) adreslar to‘gri keladi. Ushbu holatni amalga oshirish uchun access list va Pool dan foydalanimiz
Dinamik NAT bo`yicha ishni bajarish tartibi

10.6 – rasm. Dinamik NAT tamoyili asosida qurilgan tarmoq tuzilishi

Birinchi navbatda Router1 va Router2 larga statik ip route beriladi. Chunki internet qismidagi adreslarni oldindan bilmaymiz.

Router1(config)#ip route 0.0.0.0 0.0.0.0 11.11.11.2
Router2(config)#ip route 0.0.0.0 0.0.0.0 11.11.11.1
195.158.1.1 dan 195.158.1.10 gacha public IP adreslarni tarqatishimiz uchun TATU nomli Pool yaratamiz.
Router(config)#ip nat pool TATU 195.158.1.1 195.158.1.10 netmask 255.255.255.240
LAN tarmoqlar ichida aynan 192.168.1.0/24 tarmoq internetga chiqishi uchun Access list foydalanamiz
Router1(config)#access-list 10 permit 192.168.1.0 0.0.0.255
Access list ni TATU nomli yaratilgan NAT ga biriktiramiz.
Router1(config)#ip nat inside source list 10 pool TATU
Router ning kirish va chiqish portlariga NAT ni biriktiramiz
Router1(config)#interface fastEthernet 0/0
Router1(config-if)#ip nat inside
Router1(config-if)#exit
Router1(config)#interface fastEthernet 0/1
Router1(config-if)#ip nat outside
Router1(config-if)#exit


10.7 Rasm



Router1# show ip nat translations

Router1#show running-config
10.7-rasm. Manzillarni translatsiyasi bo’yicha olingan natijalar

3.