Cisco NAT Network Address Translation Configuration

Cisco NAT Network Address Translation Configuration
Network Address Translation (NAT) translates private IP addresses of the internal network into the world's only public IP address, so that the internal network can be connected to the Internet, it is widely used in various types of Internet access methods and networks. NAT: mitigates ip insufficiency and hides the private ip address of the internal server. NAT is used for the router at the end of the LAN (the route directly connected to the Internet), and is used in a vlan environment, or the device that passes through the process does not have any relationship. NAT implementation method: static conversion (converting private ip addresses in the Intranet to public and valid ip addresses, and changing the private ip addresses. Allows you to access server devices in the internal network of an external network.) simple conversion entries and static nat port ing (MAP different service ports of different servers to different ports of the same public ip address) extended conversion entries. PAT (change the source ip address source port of the outgoing packet and perform port conversion to enable an intranet pc to access the Internet using a public ip) simple conversion entry