## 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 : ### For VirtualBox - [01_connect_box](https://assets.01-edu.org/sys/01_connect_box.tar.gz) - [01_connect_machine1](https://assets.01-edu.org/sys/01_connect_machine1.tar.gz) - [01_connect_machine2](https://assets.01-edu.org/sys/01_connect_machine2.tar.gz) ### For UTM - [01_connect_box](https://assets.01-edu.org/sys/01_connect_box.utm.zip) - [01_connect_machine1](https://assets.01-edu.org/sys/01_connect_machine1.utm.zip) - [01_connect_machine2](https://assets.01-edu.org/sys/01_connect_machine2.utm.zip) 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 .-----------------------------. | NAT | | | | DHCP server | .----------------------. | DNS server | | box | | | | | | (10.0.2.2) NIC |<--->| INT_2 (10.0.2.15) | | | | ^ | '-----------------------------' | | | .-----------------------------. | | | | Internal Network | | | DHCP server | | | | v | | |<----->| INT_1 (192.168.0.1) | | | | | | | | | '----------------------' | | | .----------------------. | | | | machine1 | | | | | | | |<----->| INT_1 (192.168.0.2) | | | | | | | | | '----------------------' | | | .----------------------. | | | | machine2 | | | | | | | |<----->| INT_1 (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)