‫We will set up a virtual network structure for the applications we will do in the training.
‫In this way, we will prevent damage to real systems and other devices connected to the network.
‫While making applications.
‫It is necessary to set up a virtual network in the VMware program, because during the course, we will
‫ensure that all the virtual machines we will use are in the same virtual network.
‫A network is the ability of multiple devices to communicate with each other, wired or wirelessly.
‫It is used for connection to a network device.
‫Usually we will configure a Nat network so that all virtual machines are on the same network.
‫When we create a Nat network, the virtualization program will automatically assign IP to all computers
‫on this network.
‫YP is the address required for a computer to communicate with other computers over the network.
‫Each computer must have a different IP.
‫Every computer connected to the internet has an IP address.
‫It stands for address for computers.
‫Each computer must have a different address.
‫There are two different versions of the IP address IPv4 and IPv6.
‫The commonly used IPv4 is 32 bits long.
‫It consists of four eight bit numbers, each separated by dots.
‫Example 192.168 1.1.
‫Each group of numbers can have a value between zero 255.
‫If there are two computers with the same IP, there will be IP conflicts on the network.
‫Dhcp, the anemic host configuration protocol is used to prevent this.
‫Dhcp assigns a different IP to each computer.
‫This does not cause conflict.
‫VMware Nat network created to set up a Nat network.
‫When a virtual computer is installed on VMware Workstation player, it is created in Nat network by
‫default.
‫To see that the virtual computer you set up is in the Nat network, open the VMware Workstation Player
‫program.
‫Click on the virtual computer and click Edit Virtual Machine setting.
‫On the right side of the screen, the Virtual Machine settings screen will appear.
‫You can see that Nat is written in the network adapter section.
‫Do the same for other virtual computers and complete your checks.
‫Connection test.
‫Testing that the installed virtual machines can communicate with each other.
‫For this test, we need to check that each virtual computer can communicate with each other.
‫For this, it is enough to check whether the virtual computers are on the same network and ping each
‫other.
‫Now let's test that the Kali Linux virtual system can communicate with other virtual systems over the
‫network.
‫For this Open Kali Linux.
‫Click on terminal being the IP address of the Metasploitable computer.
‫To do this type ping Metasploit IP value and press enter.
‫The screen will show that the ping packets are going.
‫This means that communication is taking place.
‫Bring the IP address of the computer to do this.
‫Enter ping IP value and press enter.
‫The display shows that ping packets are going out.
‫In this case, communication is taking place using the IP address of the Windows 7 computer.
‫For this, enter ping win7 IP value and press enter key.
‫The screen shows that the ping packets are going.
‫In this case communication is taking place.
‫If it is seen on the screen that ping packets do not go.
‫This may be because ping requests are blocked on the firewall.
‫On the Windows 7 computer.
‫In this case, you can test whether there is communication by doing the reverse operation.
‫Log in to the Windows 7 computer.
‫Click the start button.
‫Type cmd in the search field.
‫Open the command line.
‫Enter the IP address of the Kali Linux computer in the command line, type ping Kelly IP value and press
‫enter key.
‫It is seen on the screen that ping packets are going.
‫In this case communication is taking place saying the IP address of Windows 8 computer.
‫For this ping one eight IP value is typed and enter key is pressed.
‫The ping packets are shown on the screen.
‫In this case, communication is taking place.
‫If it is seen on the screen that ping packets do not go.
‫This may be because ping requests are blocked on the firewall on the Windows 8 computer.
‫In this case, you can test whether there is communication by doing the reverse operation.
‫Log in to the Windows 8 computer.
‫Click the start button.
‫Type cmd in the search field.
‫Open the command line.
‫Enter the IP address of the Kali Linux computer in the command line, type ping Kali IP value and press
‫enter key.
‫It is seen on the screen that ping packets are going.
‫In this case communication is taking place.
‫Connection test ping the IP address of the windows XP computer for this type.
‫Ping windows XP IP value and press enter key.
‫The ping packets are shown on the screen.
‫In this case, communication is taking place.
‫If it is seen on the screen that ping packets do not go.
‫This may be because ping requests are blocked on the firewall on the windows XP computer.
‫In this case, you can test whether there is communication by doing the reverse operation.
‫Log in to the windows XP computer.
‫Click the start button, type cmd in the search field.
‫Open the command line.
‫Enter the IP address of the Kali Linux computer in the command line, type ping Kali IP value and press
‫enter key.
‫It is seen on the screen that ping packets are going.
‫In this case communication is taking place.
‫Now our Net network is ready.