Refer To The Exhibit. R1 Is Configured For Nat As Displayed. What Is Wrong With The Configuration?

Refer to the exhibit. R1 is configured for NAT as displayed. What is wrong with the configuration?

• NAT-POOL2 is not bound to ACL 1.
• The NAT pool is not right.
• The misconfiguration of the Access-list 1.
• Interface Fa0/0 should be identified as an outside NAT interface.

Answer: the R1 needs to have NAT-POOL2 bound to the ACL 1. This task is completed with the command R1(config)#ip nat within the source list 1 pool NAT-POOL2 .it will give access to the router to check the interesting traffic whether it is matched with the ACL 1 if yes then it would translate with the use of the NAT-POOL2 address.

What is NAT (Network address translation)

For access to the internet, one specific IP address is necessary but we can use the private IP address for our private network. NAT is designed so that multiple devices can use the same IP address if it is necessary. Mostly NAT works on the router or the firewalls.

For access to the lost host, the NAT is used to convert one or more local IP addresses to the Global IP address it can also translate the port number such as it can mask the port number of one host from the other host, within the packet which is forwarding toward the destination. The IP address entries and the port number are listed in the NAT table.

NAT working

The work begins with the gateway selection which sits among two local networks: the internet network and the outside network. The inside network is usually assigned the IP addresses which cannot route to an external network. Some of the external IP addresses are allocated to the gateway. The work of the gateway is to give the valid external address to the traffic which is coming from the system inside. The coming traffic point at the reliable external address and move toward the destined internal system.

The process is concerned with security, and the reason is that the incoming and the outcoming request has to move with the procedure of the translation which gives the offer to certify and authenticate the coming streams and match with the departing request.

Pros of NAT:

• The legal IP is preserved by NAT.
• Privacy is the utmost factor in NAT, the IP address, incoming and outgoing traffic will be hidden.
• The renumbering of the address is terminating during the involvement of the network.

Cons of NAT

• The translation in switching causes the delay.
• When the NAT works some of the applications will not work.
• Due to the NAT, the router should not tamper with the port numbers.