GNS is here to help you migrate to the cloud and keep your data in a centralized location where you can access it at any time. GNS is a specialty provider of Cloud, IT (LAN / WAN / Voice/ Mobile / Databases / System) solutions. We have been a reliable solutions provider. Open GNS3 as root user by using the “sudo” command. Add a cloud node to the topology, right-click it select configure navigate to the NIO TAP tab and in the textbox enter tap0, click add and click OK. Enter tap0 under the NIO TAP tab and click add. Looks like you're using an older browser. To get the best experience, please upgrade. UPGRADE MY BROWSER.
I thought I would create this article to help you and the tonnes of engineers and network enthusiasts who have had a nightmare with how to connect GNS3 to Internet. The method below also applies to connecting gns3 to your home network so remote access to your devices can also be possible. A typical example is the ability to connect your ASDM to your ASAs without the need to create a dedicated VM to achieve this. I will do justice to that separately in another article.
For a real network hands-on experience it is a must for you know how toconnect gns3 to the internet so you can perform nat rules, access statements, routing protocols and what have you. I hope that this expert article helps you achieve gns3 connectivity to the internet.
A few versions ago, the gns3 cloud node was dragged into a project and it helped to bridge your lab to the real world’s internet connection. The newer GNS3 has caused some troubles for many making it difficult for them to understand how to connect gns3 to internet. I am here to help you set up your lab and get your network devices speaking with the internet.
GNS3VM – In my case running in VMWare Workstation 12
My GNS3 VM Appliance has 2 Interfaces – VMnet2 and VMnet0.
Gns3 Cloud Configuration
I have configured an additional interface VMnet0 which bridges to my host machine’s network. This provides internet for the gns3 vm appliance and to verify this, I have perform a connectivity test as per the screenshot below;
Check your network from your host machine and note down the default gateway
Configure your VMWare Network Bindings similar to Hyper-V and Workstation platforms as well.
On Host PC – I am using a VPC – Look at this cheat sheet to configure the essential aspects required to successfully connect gns3 to internet.
Let us start configuring gns3 to connect to the internet
On R1 configure the Inside IP Address on R1 FastEthernet0/0,
On host machine;
Configure the Outside Interface IP Address on R1 FastEthernet0/1
Perform the NAT rules
Identify Connected Inside and Outside interfaces
Perform a NAT Overload
Verification on R1c- Ping Google’s DNS 220.127.116.11 via the FastEthernet 0/0 interface which sits on the Inside network.
Now verify if you can ping from your host machine;
Set DNS on Machine and perform test;
I hope this has been informative for you and I thank you for reading on how to connect gns3 to internet.
Here I am listing all the working versions of Cisco IOS which I have tested with the latest version of GNS3.
Update as on 14th May 2018 –
All the IOS, IOU, Nexus and other images has been updated, checked and verified with latest GNS3 & GSN3 VM. Download here – https://i.srijit.com/gns3images
Feel free to download them and use them for your Cisco certifications studies.
Old ones are kept intact for your reference-
- 1700 – http://i.srijit.com/CiscoIOS-GNS3
- 2600 – http://i.srijit.com/CiscoIOS-GNS3
- 2691 – http://i.srijit.com/CiscoIOS-GNS3
- 3640 – http://i.srijit.com/CiscoIOS-GNS3
- 3660 – http://i.srijit.com/CiscoIOS-GNS3
- 3725 – http://i.srijit.com/CiscoIOS-GNS3
- 3745 – http://i.srijit.com/CiscoIOS-GNS3
- 7200 (v15) – http://i.srijit.com/CiscoIOS-GNS3
- 7200p (v15) –http://i.srijit.com/CiscoIOS-GNS3
Gns3 Cloud Lab
If you face any problem setting it up with GNS3 drop me a message and I will get back to you asap.
GNS3 is an open source (GNU GPL) software that simulates complex networks while being as close as possible from the way real networks perform, all of this without having dedicated network hardware such as routers and switches.
GNS3 provides an intuitive graphical user interface to design and configure virtual networks, it runs on traditional PC hardware and may be used on multiple operating systems, including Windows, Linux, and Mac OS X.
In order to provide complete and accurate simulations, GNS3 actually uses the following emulators to run the very same operating systems as in real networks:
Gns Cloud Account
- Dynamips, the well known Cisco IOS emulator.
- VirtualBox, runs desktop and server operating systems as well as Juniper JunOS.
- QEMU, a generic open source machine emulator, it runs Cisco ASA, PIX and IPS.
GNS3 is an excellent alternative or complementary tool to real labs for network engineers, administrators and people studying for certifications such as Cisco CCNA, CCNP andCCIE as well as Juniper JNCIA, JNCIS and JNCIE.