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All right.

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Let's head out to Virtual Box to get our private host only network ten dot odah three dot x setup.

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There's been a few changes to virtual box in the last few versions, so I've updated this section to

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make it easier for everybody to follow.

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Let's take a look over at Virtual Box.

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One thing that we haven't done yet is put a shortcut either on our programs we knew or on our launch

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pad, depending on whether you're running Windows or Mac.

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And I'd like to do that now.

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So I'm going to bring virtual box.

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I'm just going to click it and drag it down to my dock here.

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I'm going to put it just someplace around the middle or the right hand side.

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There we go.

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And now any time I went to lunch, virtual box, it'll be closer.

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If you're on a P.C., you just want to drag and drop that menu item from your programs folder over onto

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your start menu.

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You'll be able to pin it to your start menu so that it's a little faster and easier.

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Now let's open up virtual box.

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So the first thing we want to do is set up our private network and a virtual box moved where that was

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back in version five or so.

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Now, in version six, it's still here under virtual box and file.

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And if you're on a P.C., everything is under file.

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But we're going to come down to file.

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And this is called a host.

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Network manager.

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The host network just means that we'll have a host only we're not going to be public out to the Internet.

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Like we mentioned, the Internet will be safe from us and we'll be safe from the Internet that hosts

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only network.

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Let's see, though, other machines inside our network.

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By default, the net network that you're connected to, the 10 that up to that 15, if you've already

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run your IP address, is only able to see the one computer, the one virtual machine and our host computer.

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You're not able to see out.

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You're able to see the Internet, but you're not able to see out to any of the other virtual machines.

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We want to create a network lab where they can see one another.

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So under file, you'll find host network manager on a Mac that's up here on the upper left of your window

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on a P.C. that is down here on the menu bar.

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And you'll see file come to host network manager.

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And this moves around from time to time between versions of virtual box.

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So you may have to look around just a little bit to find something related to host network or network

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manager.

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So we're gonna create a new host only network.

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And by default, it's going to be called V box net zero.

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That's OK.

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It'll have an IP address mask of 192 168 56.

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That just means that you'll get an address in that set of IP addresses from 192 168 56 dot one through

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254.

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But we're gonna double click that because we want to change the properties of that host only network.

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So the host only network, we said, would be a 10 Dot Odah three.

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And we will configure the adapter to have a dot to address turned out Odah three, dot two.

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That will be our host only adapter.

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So if we want to ping our actual virtual our desktop computer, it will have an adapter address here

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in this range and we'll leave the network mass 255 255 255 zero.

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That means these first three bytes, the 10 dot dot three will remain the same for every computer on

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this network.

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So the 255, 255, 255 just locks all of those bits for the first three bytes in place.

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And then what can change is this last byte.

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So the dot to go to a dot for probably all the way up to a dot, one hundred would be a good range for

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us.

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So that's the first step we've given ourselves a new host only network V box.

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Net zero.

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And then we've said that the adapter or the network card itself will be a 10 dot dot three dot to address.

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Next, we need to set up d.H C.p.

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So d.H S.P. is the dynamic host configuration protocol.

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You don't need to remember most of that unless you're taking a certification exam.

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But d.H S.P. just means that we can get dynamic host addresses.

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So every time we connect a new client or a new host onto our network, we get a new IP address or we

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get a an IP address from a pool that gets reassigned.

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If you go to your local coffee shop or library or anyplace else that has Wi-Fi, you're probably getting

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a DHC IP address.

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That way you don't have to reconfigure every time you come onto the network.

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It automatically gives you an address.

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And once someone leaves and takes their cell phone with them or their tablet or their laptop, it will

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give that IP address to the next person who needs it.

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If it runs out of IP addresses in the in the pool.

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So what we're gonna do is configure a D.H C.p server and we need to use the same IP address range as

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our adapter.

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So I'm going to say 10 out of the three to three for our D.H S.P. server.

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This will be a virtual server that hands out addresses on this tendo the three network.

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And the Silver Mask will stay the same.

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We'll all have 10 Odah three addresses and we can give a lower and upper address bound.

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We can have addresses anywhere from 10 to Doda 3D out one all the way to 10 that Odah three dot 255.

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But for practical purposes and then because we've only got a small number of machines in this lab,

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you might say 10 at three dot four as the first machine address.

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The lower address.

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And instead of 10 DataDot three dot 254, you might say, 10 dot o dot three, dot one hundred.

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That would give us about 96, 97 addresses that we can hand out between Tendo dot three to four and

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turned out Odah three, dot one hundred.

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So once we apply that.

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Good.

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We were we should see it update and we'll come back here will enable and close.

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And if we come back into file host network manager, we'll now see that we have a 10 dot dot three address

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for our virtual box.

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Net zero.

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That is our host only.

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And let's go ahead and configure our machines for that set of addresses.

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The way we'll do that is we'll actually change the network properties of each one of these virtual machines

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so that they recognize the correct network.

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The virtual box net zero host only network for safe ethical hacking.

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We'll start that in the next lesson.