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