NAT Configuration - Static NAT

Purpose:

• In this lab we use Packet Tracer in order to learn how to configure Static NAT on a Cisco Router (Mapping a web server to an external Router Port).

Materials:

• Cisco Packet Tracer
• Lab Packet Tracer File

Objective:

The completed lab environment should look similar to below:

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Working Notes/Documentation:

Setting NAT interfaces

Pre-Req: Make sure to configure the appropriate network interfaces, IP Addresses, and route on your Cisco Router before proceeding with the config below

In order to configure NAT Rules on a given Cisco Router, we must first define our "Inside" and "Outside" NAT Interfaces:

# Configures the Internal NAT Interface
R1(config)> interface <Internal-Network-Adapter>
R1(config-if)> ip nat inside
R1(config-if)> exit

# Configures the External NAT Interface
R1(config)> interface <External-Network-Adapter>
R1(config)> ip nat outside
R1(config-if)> exit

Commands for static NAT with example

Pre-Req: Ensure that routing has been configured and the NAT "inside" + "outside" interfaces have been defined.

# Creates a new Static NAT Rule
R1(config)> ip nat inside source static <Internal-IP-Address> <External-IP-Address>

Verifying Static NAT via NAT Table

From here, you can verify your new Static NAT configuration using the command below to show the current running NAT Table:

• R1#show ip nat translations

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Deliverables:

Deliverable 1:

Figure 1: Screenshot of me successfully accessing a Webserver (50.0.0.1) that was port forwarded via Static NAT.