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Table

1. Prerequisites
2. Summary
3. VirtualBox VM Setup
4. Ubuntu Server installation
5. Ubuntu Server Configuration

Prerequisites

1. Have Network Adapter setuprunning
2. If you have not setup your network adapter look here https://goo.gl/vs4cHC.
3. Just copy the Prerequisites of peoples guides before yours here.
4. Have your virtual environment configured
5. Have the ISP gateway running.
6. Have pfSense running.

Summary

The logical ideal of this tutorial is for you to be able to setup the ISP server for your lab. The ISP lab is the one that allow you to connect your other lab to the internet think at it as your internet provider at home.

Network adapters	Description
Adapter 1	Leave it to NAT
Adapter 2	Change to Host-only (WAN Environment)

VirtualBox VM Setup

1. Go to Ubuntu and download the LTS server version.

• Install Ubuntu Server in Virtual Machine
• On Virtual Box go to top left corner to New to create the virtual box.

• Create the name of this Box recommended name ISP Ubuntu
• In Type choose Linux if is not auto setected
• In Version choose Ubuntu (64-bit)

• On the memory section depending to your machine RAM capacity the minimun should be (254MB) but if you have enough memory use (1024MB)

• Leave the Hard drive section as default which is (Create a virutal hard disk now)

• Leave the Hard disk file type to (VDI)

• Leave storage on physical hard disk to (Dynamically allocated) this will used the hard drive memory dinamically until it reach the max you gave it on the next step.

• For this machine the minimun for Ubuntu so it does not give you problem set the File location and size to (20.00GB)

• After the Virtual Machine is created now you have to add the ISO that you download at the beginning
• Go to Storage section and click on top that it say [Optical Drive]Empty

• Then press Choose disk image...

• Find the location where you download your ISO for Ubuntu Server.

• On this step make sure you add the network adapters to the server

• Right click the ISP Ubuntu and click settings

• On network adapter one leave it to NAT
• Then go to Network Adapter 2 and change the network adapter to WAN Environment like the picture bellow.

• On this part start the ISP ubuntu virtual box to start the setup.

• Click on the ISP Ubuntu then press start

Ubuntu Server installation

1. The setup of the ISP Ubuntu on the photos bellow

• select you language

• Press enter on Install Ubuntu Server

• Select the language again

• Select your location

• Press no on the Configure the Keyboard

• Select Keyboard language

• Select enp0s3 which is the NAT this might vary on your PC

• Set the Hostname of you VM machine to whatever you want

• Set the full name for new user

• Then set your Username for your account

• Set the new user password

• verify password again

• Select if you want to encrypt your home directory I advice to select no for this test lab

• Select your Time zone if the one shown is correct press yes otherwise press no

• Select Partition disks select the default the one on the picture.

• Select disk partition the default

• On the next step select YES on configure LVM

• Select the partition size you need to leave it as default

• Press yes on write the changes to disks

• Do not set a proxy leave black and press continue

• The update question is all up to you. Can be setup to no auto updates or install security updates automatically

• On the sofware selection for this lab leave default

• on the install the grub boot loader question select YES

• On the last question select continue

Ubuntu Server Configuration

1. After Reboot log in into computer with the username you setup early and enter password to log in

• First step run sudo apt-get update sudo apt-get upgrade to make sure the system is up to date.
• Enable ipv4 routing on Ubuntu. By default Ubuntu doesn’t allow for routing on IP traffic.
• To get this done you will need to edit sysctl.conf which is on the directory /etc/.
• This can be done by using nano like so, sudo nano /etc/sysctl.conf.
• It will require your root password since it effect the entire system when you edit this file.

• Go to the line that say Uncomment the next line to enable packet forwarding for IPv4 and the remove the symbol # by removing the # sign this will make the program read and use that line to enable packet forwarding.

• Then press control+X to save the config file on ubuntu and enter Y to confirm the file and safe the file

• Then press Enter to make sure the file name stay the same

• Next step run command ip link show to see which network interfaces are up it will look like the picture bellow
• You should have you loopback lo and your network adapters enp0s3 and enp0s8 or similars.

• You will need to add another interface to the server which is going to be the ip address for your lap to go into th einternet.
• Run command on the terminal sudo nano /etc/network/interfaces and enter your admin password

• Then you will see a text file like bellow

• Then add the new network adapter like bellow
• ISP sever network interface
• auto enp0s8 iface enp0s8 inet static address 172.31.11.1 netmask 255.255.255.248 up route add -net 172.0.0.0 netmask 255.0.0.0 gw 172.31.1.2

• Then press control X to exit and Y to save file then enter to leave the file with the same name do not change the file name

• run sudo reboot on the terminal this will reboot the machine and the seeting on the interfaces will take effect
• Then run router on the terminal after it reboot it shout look like picture bellow

• Then run the next line on terminal this will add the new network adapter to your network route.
• sudo route add –net 172.0.0.0 netmask 255.0.0.0 gw 172.31.1.3 dev enp0s8

• Then run route again to verify it took effect

• Then run sudo services networking restart to restard the network services nothing will display it only going to ask you for your admin password. This will restard your network services for the code above take effect.

• Then to verify everything is working fine run ifconfig the enp0s8 should have the infomation you enter like bellow

• Before running the following command run sudo apt-get update and upgrade and sudo apt-get install iptables-persistant this will make the followin lines work correctly.
• Then run this tree line on terminal like the picture bellow this will enable persistent on the iptables.
• sudo apt-get install -y iptables-persistent

• Then on the next two question select yes like bellow

• Run next line bellow and password if ask it will not display anything after you run the line same as above is to make the iptables not reset.
• sudo iptables -t nat -A POSTROUTING -o enp0s3 -j MASQUERADE

• Run next line bellow and password if as and it will look like the picture bellows
• sudo netfilter-persistent save

• Run next line bellow and password if as and it will look like the picture bellows
• sudo netfilter-persistent reload

• After all this reboot Virtual Machine which can be done by running the following command sudo reboot now and move to next step pfsense setup.