Monday , 24 October 2016

How to Connect GNS3 to the Internet

How to Connect GNS3 to the Internet

How to Connect GNS3 to the Internet ?

What is GNS3 ?

GNS3 is an open source software that simulate 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. Connecting GNS3 to the internet is just another step to bring your emulated network lab closer to real gear.

Today I am going to show you How to Connect GNS3 to the Internet using your WIFI connection or your present network connection.

Open your GNS with RunAsAdministrator and take one Router and one cloud. Initially in the Topology side it will show you red. Now from the Add link menu (cable connection icon) select the fast Ethernet and connect both router and cloud. it will show you ” No inteface available , please configure this device “.

gns1 Nothing to worry about this error. Right click on the Cloud and select the configure option. gns2 it will open your Node Configurator window. Now select Your Wireless interface or your Network interface. gns3 that are connected with internet gns4

Now right-click on the Router and select the Console option. it will open your Router IOS image file.


Now you need to be configure the interfaces to get IP-address from the DHCP server that you are connected. Configurations are as below.

R1# configure terminal

R1(config)#interface fastetherent 0/0

R1(config-if)#ip address dhcp

R1(config-if)#no shut


wait for second, it will show you IP-address assigned by DHCP server.


Now ping to or any IP-address


Now You are able to ping, here first packet will be drop due to ARP Broadcast.

Other method is Using Loopback adapter.

Download GNS3

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About Syed Balal Rumy

A 27 year Tech Geek and a blogger from India ( Bihar ) , live in New Delhi. I am MCITP , CEHv8 , CCNA , CCNA Security , CCNP Security , Security + and CCSA certified. Loves to write tech articles based on my real experiences.

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