Learning Network 13--Port-based NAPT via Cisco emulator Cisco PACKET Tracer

Network address port Conversion NAPT is a very familiar way of transformation. NAPT is commonly used in access devices, which can hide small and medium-sized networks behind a legitimate IP address.

Unlike dynamic address NAT, NAPT maps An internal connection to a separate IP address in the external network, adding a TCP port number selected by the NAT device to the address.

This time, let's get to know napt.

Configuration ideas

1 Configure the router's interface IP address, note the network segment differences

2 Configure the IP address of the PC and server, configure Router 1 to route to the server network segment statically

3 Configuring the Access Policy for Router 1 (intranet) (Access-list)

4 new NAT Address pools (IP NAT Pool)

5 Configuring the NAT conversion direction of the router port (IP Nat Inside/outside)

6 associating NAT address pool to access list

Experimental topology

1 Configuring the interface address for Router 1

2 Configuring the PC and server IP addresses

3 Create a new static route and access list on Router 1

4 Create a new NAT address pool on Router 1 and associate the access list

5 Configuring the NAT translation direction on the router interface address

Validation test

View conversion history for Router 1

Test access to an extranet Web server

Learning Network 13--Port-based NAPT via Cisco emulator Cisco PACKET Tracer