wiki:netmon2017vmconfig

Version 7 (modified by admin, 7 years ago) ( diff )

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VirtualBox and Virtual Machines Configuration

In this Hands-on you will create two seperate ubuntu virtual machines. These VM's will be used to install network monitoring systems and tools.

Setting up the Virtualbox

Installation of VirtualBox and Downloading virtual hard disks

  • Download and install VirtualBox 5.0.x​
  • Download the Virtual Hard disks from the LEARN mirror. You can get them by following links
  • Note down the location of downloaded vdi files

Creating the VM NetMon

  • Start VirtualBox and Click on New button (at top-right) to create new virtual machine
  • Enter name of the VM as NetMon
  • Select OS Type: Linux
  • Select Version: Ubuntu (64-bit)
  • Then click on Next button
  • Set VM's memory size to 1024MB and click on Continue button
  • Set VM's hard disk option to Use an existing virtual hard disk file and click the browse button and browse to the location where you download the virtual hard disks. Then select the NetMon.vdi file and click on the create button.
  • You will see a new virtual machine named NetMon appears on Virtual Box Manager Window

Setting up Network Interfaces

  • Select the NetMon VM from left panel on Virtual box, right click and open Settings
  • Click on the Network title
  • On Adapter 1 check the Enable Network Adapter. Then change Attached to to the Bridged Adapter and make sure the name of the interface is the same interface which you use to connect to the outside (Either Wi-Fi or Ethernet). This virtual interface will work as the WAN port of the of your virtual campus network that can be used to connect from outside.
  • Click on Advanced drop down list and change the promiscuous mode to Allow All
  • Click OK

Adding processors

  • Select the NetMon VM from left panel on Virtual box, right click and open Settings
  • Click on the System title
  • Go to Processor tab and set processors to 2
  • Click ok

Create the Second VM

For the next two days of the workshop, you will need another linux box. Instead of Installing OS we can clone your VM and create a new VM. You can easily create the second VM using VM cloning. This VM is for your LibreNMS network monitoring system.

First Log in to the VM and enter

sudo init 0

Right click on the VM to select Clone option Assign new name as LibreNMS Check "Reinitialize the MAC address for all network cards And then click on Continue Select Full clone This might take some time to create the new virtual disk image (vdi) file. Note that your new VM is same as your previous one. You have to change the host name, IP addresses, etc accordingly.

Setting Up IP Addresses

NetMon VM

  • Select the NetMon VM from left panel on Virtual box, right click Start and wait till the VM starts
  • Login to the machine using the following user credentials 
    usrname  : admin
password : <classpassword>
  • Then change the interfaces file. Root password is the same as class password 
    sudo vi /etc/network/interfaces
  • locate the following lines 
    iface enp0s3 inet static
 address 192.168.1.1
 netmask 255.255.255.0
 network 192.168.1.0
 broadcast 192.168.1.255
 gateway 192.168.56.254
 dns-nameservers 192.248.1.161
  • Change it to the following lines. You can find your IP Address from this table 
    iface enp0s3 inet static
 address <Your IP Address >
 netmask 255.255.255.0
 network 192.248.6.0
 broadcast 192.248.6.255
 gateway 192.248.6.254
 dns-nameservers 192.248.1.161
  • Save and Exit the editor (type :wq)
  • When you completed the IP settings , reboot the machine 
    sudo reboot
  • Confirm the correct IP settings by ifconfig command. Your result should be something like the following. Check the IP address of enp0s3 Interface and see whether the other interfaces are up 
    enp0s3    Link encap:Ethernet  HWaddr 08:00:27:8c:e0:26
          inet addr:<your IP address>  Bcast:192.248.6.255  Mask:255.255.255.0
          inet6 addr: fe80::a00:27ff:fe8c:e026/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:1120 errors:0 dropped:0 overruns:0 frame:0
          TX packets:7550 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:99387 (99.3 KB)  TX bytes:567441 (567.4 KB)

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:160 errors:0 dropped:0 overruns:0 frame:0
          TX packets:160 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1
          RX bytes:11840 (11.8 KB)  TX bytes:11840 (11.8 KB)
  • Try ping to some known hosts and see the results. 
    ping 192.248.6.254
ping 192.248.1.161
ping www.google.com

LibreNMS VM

  • Select the LibreNMS VM from left panel on Virtual box, right click Start and wait till the VM starts
  • Login to the machine using the following user credentials 
    usrname  : learn
password : <classpassword>
  • Then change the interfaces file. Root password is the same as class password 
    sudo vi /etc/network/interfaces
  • locate the following lines 
    iface enp0s3 inet static
 address 192.168.1.1
 netmask 255.255.255.0
 network 192.168.1.0
 broadcast 192.168.1.255
 gateway 192.168.1.254
 dns-nameservers 192.248.1.161
  • Change it to the following lines. You can find your IP Address from this table 
    iface enp0s3 inet static
 address <Your IP Address >
 netmask 255.255.255.0
 network 192.248.6.0
 broadcast 192.248.6.255
 gateway 192.248.6.254
 dns-nameservers 192.248.1.161
  • Save and Exit the editor (type :wq)

Setting the Hostname and FQDN

Login to the vm. change to root user 

$sudo su

Give your password

Edit /etc/hostname 

#nano /etc/hostname

Change NetMon to LibreNMS Save and Exit also edit /etc/hosts file to change 127.0.0.1 NetMon to 127.0.0.1 LibreNMS

When you completed the IP settings , reboot the machine 

sudo reboot

Confirm the correct IP settings by ifconfig command. Your result should be something like the following. Check the IP address of enp0s3 Interface and see whether the other interfaces are up 

enp0s3    Link encap:Ethernet  HWaddr 08:00:27:8c:e0:26
          inet addr:<your IP address>  Bcast:192.248.6.255  Mask:255.255.255.0
          inet6 addr: fe80::a00:27ff:fe8c:e026/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:1120 errors:0 dropped:0 overruns:0 frame:0
          TX packets:7550 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:99387 (99.3 KB)  TX bytes:567441 (567.4 KB)

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:160 errors:0 dropped:0 overruns:0 frame:0
          TX packets:160 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1
          RX bytes:11840 (11.8 KB)  TX bytes:11840 (11.8 KB)

Try ping to some known hosts and see the results. 

ping 192.248.6.254
ping 192.248.1.161
ping www.google.com
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