3.0 KiB
connect
To communicate over a network, a computer must have an IP address.
The computer can choose its own IP address (static) or can ask a DHCP server to assign one (dynamic).
Generally, clients (smartphones, laptops, etc...) rely on DHCP servers to have a dynamic IP address and servers have a static IP address.
For this project you will need to add these 3 VM :
The VM are configured like this :
N E T W O R K S C O M P U T E R S
_______________________________ ________________________
.-----------------------------.
| Internet |
'-----------------------------'
^
|
v
.-----------------------------.
| VirtualBox NAT |
| |
| DHCP server | .----------------------.
| DNS server | | box |
| | | |
| (10.0.2.2) NIC |<--->| enp0s8 (10.0.2.15) |
| | | ^ |
'-----------------------------' | | |
.-----------------------------. | | |
| VirtualBox Internal Network | | | DHCP server |
| | | v |
| |<----->| enp0s3 (192.168.0.1) |
| | | | |
| | | '----------------------'
| | | .----------------------.
| | | | machine1 |
| | | | |
| |<----->| enp0s3 (192.168.0.2) |
| | | | |
| | | '----------------------'
| | | .----------------------.
| | | | machine2 |
| | | | |
| |<----->| enp0s3 (192.168.0.2) |
| | | |
'-----------------------------' '----------------------'
You will only have control over "machine2". This computer have Internet access through the "box".
Start the 3 VM and test on machine2 the connectivity quality with this command :
timeout --signal SIGINT 1m ping google.com
After one minute the result shows the percentage of lost packets. It should be quite high (above 10%). machine1 and machine2 have the same IP address, which leads to connectivity problems.
Find how to :
- change the IP address to avoid the conflict
- make the IP address dynamic (attributed by the box DHCP server)