Skip to main content

Configuring NAT in Cisco Packet Tracer

NAT:-

 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 destination. It then makes the corresponding entries of IP address and port number in the NAT table. NAT generally operates on router or firewall.
Static NAT Practice Topology

 PROCEDURE (for Static):-
1) Take two routers and 4 PC's.
2) Connect 2 PC's each with switches and connect to with router. Then connect the routers.
3) Assign the IP, subnet mask and gateway.

 Router 1 (Fa 0/0)............. 10.0.0.1          255.0.0.0               ---------
Router 1 (Se 2/0)............. 10.0.0.1          255.0.0.0               ---------
Router 2 (Fa 0/0)............. 192.168.1.1    255.255.255.0       ---------
Router 2 (Se 2/0)............. 100.0.0.20      255.0.0.0               ---------
PC 1                   .............. 10.0.0.10        255.0.0.0              10.0.0.1
PC 2                   .............. 10.0.0.20        255.0.0.0              10.0.0.1
PC 3                   .............. 192.168.1.10  255.255.255.0      192.168.1.1
PC 4                   .............. 192.168.1.20  255.255.255.0       192.168.1.1

 Then write the command in each router after 'config' command in each of the router.
Router(config)# if not inside router static[inside local IP address] [inside global address]
  • Then define NAT inside from which the PC's are connected.
  • Here, fast Ethernet 0/0.
  • Router (Config-if)# if not inside.
  • Then write the command router (config-if)# IP not outside from where the connection will go to outside world.
  • Now configure static routing between Router 1 and Router 2, here we need RIP.
  • Now, ping from the PC through their inside global IP address.

Comments

Post a Comment

Popular posts from this blog

Generate Traffic in Simulation Mode

Objectives Part 1: Generate Network Traffic in Simulation Mode Part 2: Examine the Functionality of the TCP and UDP Protocols Background This simulation activity is intended to provide a foundation for understanding the TCP and UDP in detail. Simulation mode provides the ability to view the functionality of the different protocols. As data moves through the network, it is broken down into smaller pieces and identified in some fashion so that the pieces can be put back together. Each of these pieces is assigned a specific name (protocol data unit [PDU]) and associated with a specific layer. Packet Tracer Simulation mode enables the user to view each of the protocols and the associated PDU. The steps outlined below lead the user through the process of requesting services using various applications available on a client PC.  This activity provides an opportunity to explore the functionality of the TCP and UDP protocols, multiplexing and the function of port numbers in ...
Post a Comment
Read more

Socket Programming

SOCKET PROGRAMMING TCP SOCKET PROGRAMMING TCP  Python provides two levels of access to network services. At a low level, you can access the basic socket support in the underlying operating system, which allows you to implement clients and servers for both connection-oriented and connectionless protocols. Python also has libraries that provide higher-level access to specific application-level network protocols, such as FTP, HTTP, and so on. What is Sockets? Sockets are the endpoints of a bidirectional communications channel. Sockets may communicate within a process, between processes on the same machine, or between processes on different continents. Sockets may be implemented over a number of different channel types: Unix domain sockets, TCP, UDP, and so on. The socket library provides specific classes for handling the common transports as well as a generic interface for handling the rest. Sockets have their own vocabulary − Term & Description 1...
Post a Comment
Read more

Configuring Routing Information Protocol

Routing Information Protocol  (RIP) It is a dynamic routing protocol which uses hop count as a routing metric to find the best path between the source and the destination network. It is a distance vector routing protocol which has AD value 120 and works on the application layer of OSI model. RIP uses port number 520. Steps: 1) Initially select 2 PCs,  2 Switches &  2 Routers namely, PC-1 & PC-2, Switch-1 &                Switch-2 and Router-1 & Router-2 respectively. 2) Make all the necessary connections using serial gateway 0/1, 3) Assign IP Addresses, Subnet Mask and Gateway as follows-      PC-1         192.168.2.1    255.255255.0      192.168.2.2      PC-2         192.168.3.1    255.255.255.0     192.168.3.2    Switch-1        ...
Post a Comment
Read more