Virtual-Lan
Setup a Virtual Local Area Network environment for OPS535 Labs
OS Installation
- Install 64-bit version of CentOS 5.5 with Virtualization Packages
- Create Four Virtual Machines, each with 8GB of disk space, 1G Memory, 1CPU
- Install CentOS5.5 on VM1 to VM3 with at least the following packages:
- NFS
- NIS
- DNS
- DHCP
- Postfix, sendmail
- OpenLDAP
- CentOS 5.5 configuration:
- Enable iptables
- Create a regular user account
- Enable SELinux
- Collect the following information:
- IP address(es) assigned to the host OS and each VM for the virtual network
- Name of the network device used by the host OS to connect to the virtual network
- IP address, netmask, and gateway for each guest OS
- Name of the device used by each guest OS to connect to the virtual network
- Install Fedora 14 on VM4 with the following packages:
- NFS
- NIS
- DNS
- OpenLDAP
- Wireshark
- tcpdump
Virtual Network Configuration
- Default Virtual Network
- Network Address 192.168.122.0/24
- Network Type: NAT
- Create the 2nd Virtual Network, named "opsnet"
- Network Address 192.168.[x].0/24 where [x] assigned by your professor
- Network Type: Isolated
- Locate the name of the physical network device connected to the lab network. The following configuration assume eth3 as the device name name.
- assignment 172.16.[x].1 to the alias of eth3: ifconfig eth3:0 172.16.[x].1
- Adding routes to each student's "opsnet" virtual network manually or by running the following bash script on the host OS:
#!/bin/bash route add -net 192.168.1.0 netmask 255.255.255.0 gw 172.16.1.1 route add -net 192.168.2.0 netmask 255.255.255.0 gw 172.16.2.1 route add -net 192.168.3.0 netmask 255.255.255.0 gw 172.16.3.1 route add -net 192.168.4.0 netmask 255.255.255.0 gw 172.16.4.1 ... route add -net 192.168.36.0 netmask 255.255.255.0 gw 172.16.36.1
or:
#!/bin/bash
x=1
while [ $x -le 36 ]
do
route add -net 192.168.${x}.0 netmask 255.255.255.0 gw 172.16.${x}.1
x=$(expr $x + 1)
done
- To test your static routes, pair up with a few fellow students and try to ping their VMs in their "opsnet".
- Save your network settings for the real lab.