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You can use any virtualization platform such as Oracle VirtualBox or VMware player.

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While using virtual environments.

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The virtual machines should be on the same network to see each other.

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Now we're going to use virtual machines in Nat mode.

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If you're using VirtualBox because of its architecture, you should create a Nat network.

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If you use a virtual machine in net mode without configuring any Net network, a network is created

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for that virtual machine and it doesn't see other virtual machines even if they are in net mode.

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If you're using one of the VMware tools such as VMware Player fusion or workstation using Nat mode for

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network interfaces will be enough for the virtual machines to see each other.

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Oh, and I should probably tell you that since there are a lot of vulnerabilities in it, do not use

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the virtual machines in bridge mode, which are intentionally vulnerable, such as Metasploitable or

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Owasp, broken Web applications.

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If you use them in bridge mode, they will be accessible in the network where your host machine is.

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Someone in that network might hack the vulnerable virtual machines and try to access the host machine,

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which means your computer.

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Now, if you would like to use virtual machines and host only network mode, please just learn how the

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virtualization platform works in that mode first.