How to Configure Dynamic NAT on Cisco Router in GNS3 | SYSNETTECH Solutions

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Published on March 3, 2017 5:14:02 PM ● Video Link: https://www.youtube.com/watch?v=CzxXWzY0c1U

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Guide

Duration: 14:38

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This video shows you how to configure Dynamic NAT on Cisco Router using the GNS3 network simulator program and VMware virtual machine.

✅ S U B S C R I B E ► http://goo.gl/8d0iG9
✅ Article ► https://www.sysnettechsolutions.com/en/configure-dynamic-nat-on-cisco-router/

To enable #DynamicNAT:

Step 1: If you have not installed #GNS3 on Windows, Linux, and macOS before, please refer to the following videos.

Windows ➦ https://www.youtube.com/watch?v=uhWt6TPNp-A
Linux / Debian ➦ https://www.youtube.com/watch?v=_HsKS4iwr3M
Linux / Linux Mint ➦ https://www.youtube.com/watch?v=XU6gf_Reiuk
Linux / Ubuntu ➦ https://www.youtube.com/watch?v=8atzceBgN-c
macOS ➦ https://www.youtube.com/watch?v=MWStTRpwqBY

Step 2: After you have done the setup, open GNS3, and create a new project.

Step 3: Connect the two virtual machines that you created on VMware Workstation to the Cloud.

Step 4: Add one Cisco Router and Cisco Switch to the workspace.

Step 5: Connect the Switch to the Router.

Step 6: Run the virtual machines you have added and configure their IP address configurations.

Step 7: Add one Cloud and then open its settings and select Ethernet from the Generic Ethernet NIO section and save the settings.

Step 8: After preparing the network topology for NAT, test the network connection by pinging the FastEthernet0/0 interface of Router over the virtual machines.

Step 9: Configure the IP address of the Router's WAN interface with the ip address dhcp command.

Step 10: The IP address on the Router's WAN interface will be allocated over the ADSL Modem.

Step 11: Now ping the WAN interface from the virtual machines and test the connection.

Step 12: Ping the Google DNS server from the virtual machines and check the Internet connection.

Step 13: Virtual machines will not be able to access the Internet without Dynamic NAT.

Step 14: Open R1's CLI prompt and execute the commands in the 6:10 timeframe in order.

Step 15: After configuring #DynamicNAT, VMware virtual machines will be able to access the Internet.

Step 16: You can use the following show and debug commands to verify NAT.

➦ show ip nat translations
➦ clear ip nat translation *
➦ show ip nat statistics
➦ show log
➦ debug ip nat translations
➦ debug ip packet

Step 17: Don't forget to subscribe to our YouTube channel for more videos on Cisco networking training with GNS3!


What is Dynamic NAT?

It translates a group of real addresses to a pool of mapped addresses that are routable on the destination network. The mapped pool may include fewer addresses than the real group. When a host you want to translate accesses the destination network, the ASA assigns the host an IP address from the mapped pool. The translation is added only when the real host initiates the connection.

Source: https://www.cisco.com/c/en/us/td/docs/security/asa/asa82/configuration/guide/config/nat_dynamic.html


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