Materials

Raspberry PI 3
USB-to-Ethernet Adapter (I used an Ultralink UL-USB02-EN)
RPi Power Supply
16Gb MicroSD Card
Peripherals to do setup (display, mouse, keyboard)

Build tasks

1. Create imaging https://www.raspberrypi.org/documentation/installation/installing-images/ (Be sure to download the Raspbian Jessie Lite image (Not NOOBS)). ??? Check current versions for this

   REset DEfault loign How?

2. Basic configuration

   • Update image

     Sudo Su
     apt-get update; apt-get -y upgrade

   * configure host name

   echo "gateway.butterworth" > /etc/hostname; bash; root@gateway:/home/pi#

   * Create yourself a user other than pi, although using an ssh key and disabling all password authentication may be better.

3. Configure interface for gate way router

   • Check current config

     ifconfig | grep eth

     Expect eth0 Link encap:Ethernet HWaddr b8:27:eb:9a:a1:62 eth1 Link encap:Ethernet HWaddr 00:e0:4c:53:44:58

   • configure these in /etc/dhcpcd.conf (This is specfic to PI)

   nano /etc/dhcpcd.conf#Add the following lines
   	interface eth1
   	static ip_address=10.0.0.1
   	static routers=10.0.0.1
   	static domain_name_servers=10.0.0.1,8.8.8.8

   /etc/init.d/networking restart may not reconfig interface correctly Hence use sudo reboot

   Check Ifconfig again

   Expect: etho has assighed address for external router exth has internal route

4. DHCP server setup

   apt-get install -y isc-dhcp-server

   let’s configure it —

   nano /etc/dhcp/dhcpd.conf#add the following to the endsubnet 10.0.0.0 netmask 255.255.255.0 {    range 10.0.0.10 10.0.0.50;
   option domain-name-servers 10.0.0.1, 8.8.8.8;
   option domain-name "butterworth";
   option routers 10.0.0.1;
   option broadcast-address 10.0.0.255;
   default-lease-time 600;
   max-lease-time 7200;}

  Restart service
  /etc/init.d/isc-dhcp-server restart

5. Iptable routing

   NEED  NOTES ON IPTABLESHERE

    we use iptables :

iptables -F
iptables -t nat -F
iptables -t mangle -F
iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
iptables -A FORWARD -i eth1 -j ACCEPT
mkdir /etc/iptables; iptables-save > /etc/iptables/rules.v4



But this will not persist across reboots. So we add a line to rc.local to restore like so :

nano /etc/rc.local
#add the following (BEFORE THE exit 0)iptables-restore /etc/iptables/rules.v4exit 0


TESt buy ping to google


6. Add Traffic GUI

A network traffic GUI — ntoppng — ( http://www.ntop.org ) :

apt-get install -y ntopng