JLab Server

<accesscontrol>teacher</accesscontrol>

This article is under development....

Ide

Ideen med denne server er at lave et Juniper Lab, med en logon server der giver kursisten adgang til et virtuelt netværk hvor der kan opsættes udstyr og prøves ting af i et test senarie.

Installation

Default programs

sudo aptitude install nmap bmon nmon htop mono-runtime mono-2.0-gac

EtherChanel

Nic Bonding på Ubuntu er beskrevet her: https://help.ubuntu.com/community/LinkAggregation

sudo aptitude install ifenslave

sudo nano /etc/network/interfaces

# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto eth0
iface eth0 inet dhcp
# This is an autoconfigured IPv6 interface
iface eth0 inet6 auto

#Create the interface
auto bond0
iface bond0 inet manual
#Add physical network adapters
bond-slaves eth1 eth2
#Configure load balancing mode
#mode=0 (balance-rr)
#mode=1 (active-backup)
#mode=2 (balance-xor)
#mode=3 (broadcast)
#mode=4 (802.3ad)
#mode=5 (balance-tlb)
#mode=6 (balance-alb)

bond_mode 2

Genstart networking

sudo /etc/init.d/networking restart

For at teste at det virker, har jeg lavet et program der sender UDP trafik til den bestemt IP og port, så hurtigt som maskinen kan.

Opret 2 statiske ARP's for maskinen har noget L2 at sende til:

sudo arp -s 10.0.0.3 00:00:00:00:00:01
sudo arp -s 10.0.0.4 00:00:00:00:00:02

Jeg har brugt bmon til at se om den sender noget trafik, og på hvilke kanaler.

rael@JLab:~$ ./LinuxUdpBomber.exe 10.0.0.3 5000

#Bmon snippet
JLab (source: local)
  0   lo                         0.00B            0       0.00B            0
  1   eth2                     163.00B            1       0.00B            0
  2   eth1                     395.00B            3      11.08MiB      36076
  3   eth0                     566.00B            5     100.00B            0
  4   bond0                    558.00B            5      11.08MiB      36076


rael@JLab:~$ ./LinuxUdpBomber.exe 10.0.0.4 5000

#Bmon snippet
JLab (source: local)
  0   lo                         0.00B            0       0.00B            0
  1   eth2                       0.00B            0      11.08MiB      36076
  2   eth1                     384.00B            5       0.00B            0
  3   eth0                     424.00B            6     186.00B            1
  4   bond0                    384.00B            5      11.08MiB      36076

VLans

Vlan konfiguration står beskrevet her: https://wiki.ubuntu.com/vlan

Installer vlan mgmt og load moduler

aptitude install vlan
modprobe 8021q
sudo su -c 'echo "8021q" >> /etc/modules'

Ændre i /etc/network/interfaces

auto bond0
iface bond0 inet static
 address 10.0.0.1
 netmask 255.255.255.0
 bond-slaves eth1 eth2
 bond_mode 2

auto bond0.100
iface bond0.100 inet static
 address 10.100.0.1
 netmask 255.255.255.0
 vlan-raw-device bond0