Sudo route add -net 0.0.0.0 netmask 0.0.0.0 gw 10.0.0.1 dev eth0ĭon't forget configure the eth0 ip with an ip in the same network: For the gateway you can add this command as follows, where the ip 10.0.0.1 is the same that TAP interface: Sed 's/us.//g' /etc/apt/sources.listįor connectivity, we need configure the gateway and the DNS inside the machines. If you need change your repositories zone, you can do that with this (in this case to Chilean repositories): If you need change your language keyboard, you may use this command, where 'es' is the language ID: NOTE: You can use axel to download fasterĪfter you create your VirtualMachine with VirtualBox, you need run it with GNS3 and configure. You can use a minimal Ubuntu version downloadable from: Now, you need an appliance or a any host image to create our virtual network. Sudo iptables -I OUTPUT -j ACCEPT -o tap0 Now, as we need forward the packets, between the virtual network and your physical router, you must enable the forwarding option: On the last line, you configure the ip, that will be the gateway for your virtual topology. To have a connection to access Internet through our physical interface, we create a TAP interface (virtual bridge): We need to add the repositories to apt and after install gns3: We can download older GNS3 versiones from sourceforge or the most recent from. Today we going to configure a virtual network within GNS3.
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