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## connect
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To communicate over a network, a computer must have an IP address.
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The computer can choose its own IP address (static) or can ask a DHCP server to assign one (dynamic).
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Generally, clients (smartphones, laptops, etc...) rely on DHCP servers to have a dynamic IP address and servers have a static IP address.
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For this project you will need to add these 3 VM :
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### For VirtualBox
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- [01_connect_box](https://assets.01-edu.org/sys/01_connect_box.tar.gz)
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- [01_connect_machine1](https://assets.01-edu.org/sys/01_connect_machine1.tar.gz)
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- [01_connect_machine2](https://assets.01-edu.org/sys/01_connect_machine2.tar.gz)
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### For UTM
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- [01_connect_box](https://assets.01-edu.org/sys/01_connect_box.utm.zip)
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- [01_connect_machine1](https://assets.01-edu.org/sys/01_connect_machine1.utm.zip)
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- [01_connect_machine2](https://assets.01-edu.org/sys/01_connect_machine2.utm.zip)
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The VM are configured like this :
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```
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N E T W O R K S C O M P U T E R S
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_______________________________ ________________________
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.-----------------------------.
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| Internet |
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'-----------------------------'
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^
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v
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.-----------------------------.
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| NAT |
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| DHCP server | .----------------------.
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| DNS server | | box |
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| (10.0.2.2) NIC |<--->| INT_2 (10.0.2.15) |
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| | | ^ |
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'-----------------------------' | | |
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.-----------------------------. | | |
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| Internal Network | | | DHCP server |
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| | | v |
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| |<----->| INT_1 (192.168.0.1) |
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| | | | |
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| | | '----------------------'
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| | | .----------------------.
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| | | | machine1 |
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| | | | |
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| |<----->| INT_1 (192.168.0.2) |
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| | | | |
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| | | '----------------------'
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| | | .----------------------.
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| | | | machine2 |
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| | | | |
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| |<----->| INT_1 (192.168.0.2) |
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'-----------------------------' '----------------------'
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```
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You will only have control over "machine2". This computer have Internet access through the "box".
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Start the 3 VM and test on machine2 the connectivity quality with this command :
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```
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timeout --signal SIGINT 1m ping google.com
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```
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After one minute the result shows the percentage of lost packets. It should be quite high (above 10%).
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machine1 and machine2 have the same IP address, which leads to connectivity problems.
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Find how to :
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- change the IP address to avoid the conflict
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- make the IP address dynamic (attributed by the box DHCP server)
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