Configuring Static NAT in Cisco Packet Tracer
Configuring Static NAT in Cisco Packet Tracer
NAT:
There are several situations where we need address translation such as a network which don't have sufficient public IP addresses want to connect with the internet , two networks which have save IP addresses want to merge or due to security reason a network want to hide its internal IP structure from the external world. NAT is the process which translates IP addresses. NAT can be performed at firewall , server and router.
- Our network is built with private IP addresses and we want to connect it with the internet .As we know to connect with internet we require public IP addresses. In this situation we can use NAT which will map private IP with public IP.
- Two networks which are using same IP addresses scheme want two merge. In this situation NAT device is used to avoid overlapping issue.
- We want to connect multiple computers with internet through the single public IP addresses.In this situation NAT is used to map the multiple IP addresses through the port number
Procedure-
- Take two routers, switches and 4 PC'S.
- Connect 2 PC'S each with the switches and connect ot with router. Then connect the routers.
- Assign the IP , Subnet Mask, and Gateway
Router1(Se2/0)--------10.0.0.10 255.0.0.0 -
Router2(Fa0/0) -------192.168.1.1 255.255.255.0 -
Router2(Se2/0)--------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 t' command in each of the routers
Then define the nat inside from which the PCs are connected. Here Fast Ethernet 0/0
Router(config-if)#ip nat inside
Then write the command Router(config -if)#ip nat outside from where the connectin will go
outside world.
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