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Configuring Dynamic NAT

cau hinh NAT dong

Configuring  Dynamic NAT

The article should refer to:

Posts: Configure static routing (static route and the default route)

Download file on Packet Tracer

To implement:

1. ON Router Customer:

Step 1: Configure the default routing Default Route to the command ip route

Step 2: Configure NAT:

+ Definitions range of LAN IP access list by type stardard

Access list 10 permit (LAN ip use of private)

+ Definition hired public IP range from ISP

ip nat pool public_range netmask

+ Ip nat command definition.

ip nat inside source list 10 pool public_range

+ Specify the port connection Private

interface FastEthernet0/0
ip nat inside

+ Appoint the Public port

interface Serial2/0
ip nat outside

2. On the ISP Router

Customers have to hire a specific public IP range is 6 Ip network of (ie user from to )

After the public IP tenants are supposed ISP static route to this network by static route command:



3. Some commands on the router:

– On ISP

loopback on isp


– On Router customers:

interface FastEthernet0/0
ip address
ip nat inside
duplex auto
speed auto
interface FastEthernet1/0
no ip address
duplex auto
speed auto
interface Serial2/0
ip address
ip nat outside


4. Check

ping-testdebug ip nat



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About Nguyễn Thanh Sơn

Nguyễn Thanh Sơn
Network Security, Web Design, Computer Science

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