Steps of Configuring NAT for IP Address Conservation
Network Address Translation (NAT) is a process in which one or more local IP address is translated into one or more Global IP address and vice versa in order to provide Internet access to the local hosts. Also, it does the translation of port numbers i.e. masks the port number of the host with another port number, in the packet that will be routed to the destination. It then makes the corresponding entries of IP address and port number in the NAT table. NAT stands for Network Address Translation and is used for:
- Cost Savings
- Dealing with IPv4 address shortage
- Adds a layer of privacy
- Translation between local and private IPv4 addresses.
Consider the topology: In this topology, a Cisco switch is connected with 3 Cisco PCs and a router0 Component, and that router0 is connected with another router (router1)
We will configure the devices such that PC0, PC1, and PC2 will communicate with R1 using only one IP address, which is R0’s g0/0/1 interface’s IP address.
Click on R0 and open Command Line Terminal on R0.
interface GigabitEthernet0/0/0 ip address 192.168.1.100 255.255.255.0 ip nat inside no shutdown interface GigabitEthernet0/0/1 ip address 22.214.171.124 255.255.255.252 ip nat outside no shutdown router eigrp 100 passive-interface GigabitEthernet0/0/0 network 0.0.0.0 no auto-summarization ip access-list standard name permit any ip nat inside source list name interface GigabitEthernet0/0/1 overload
Click on R1 and open Command Line Terminal on R1
interface Loopback1 ip address 126.96.36.199 255.255.255.255 interface GigabitEthernet0/0 ip address 188.8.131.52 255.255.255.252 no shutdown router eigrp 100 network 0.0.0.0 no auto-summarization
Click on PC0 and open Desktop configuration on PC0
Click on PC1 and open Desktop configuration on PC1
Click on PC2 and open Desktop configuration on PC2.
Pinging R1’s loopback from PC0:
Click on R1 and ping to PC0
Check the source IP address of the packet when it reaches Router 1:
Please Login to comment...