1
	2	
		Renouveler baille
		sudo dhclient -r eth0
		puis sur wireshark:
		(image: dhcp trouvé)
	3
		Changer adresse:
		ifconfig eth0 inet 192.168.40.5 netmask 255.255.255.0
	
	4
		desactiver dhcp (mode automatique)
		ifconfig eth0 inet 192.168.40.5 netmask 255.255.255.0		
		Pour devenir routeur:
		sudo /bin/sysctl -w net.ipv4.ip_forward=1
		sudo echo 1 > /proc/sys/net/ipv4/ip_forward
		
	5ping
		ajouter route
		sudo route add-net <@reseau> gw <@gw> <ethX>
			pour joindre leur reseau: 
			sudo route add-net 192.168.1.0 netmask 255.255.255.0 gw 192.168.2.1 eth1
			R1	192.168.40.5(eth0)
				192.168.40.160(eth0)	R	192.168.2.2(eth1)
				
			R_intermediare					192.168.2.0

			R3	192.168.1.2(eth0)
				192.168.1.1(eth0)		R	192.168.2.1(eth1)
			ajouter gateway pour pc
			route add default gw 192.168.40.160
			(image: routeur ok)

2
	6
		installer serveur dhcp
		apt-get install isc-dhcp-server
		nano /etc/dhcp/dhcpd.conf
		nano /etc/default/isc-dhcp-server
		service isc-dhcp-server restart
	8
		netstat -taupeln
		nmap -sU 192.168.40.5
	9
		option routers 192.168.40.254;
	10 
		ifconfig eth0:1		192.168.1.100
		ifconfig eth0:40	192.168.40.100
		nano /etc/dhcp/dhcpd.conf 

default-lease-time 600;
max-lease-time 7200;
option subnet-mask 255.255.255.0;
#############Réseau 40.0##################

subnet 192.168.40.0 netmask 255.255.255.0 {
        option broadcast-address 192.168.40.255;
        host routeur1 {
                hardware ethernet 2c:27:d7:20:68:87;
                fixed-address 192.168.40.254;
}
}
#############Réseau 1.0###################
subnet 192.168.1.0 netmask 255.255.255.0 {
        option broadcast-address 192.168.1.255;
        host routeur2 {
                hardware ethernet 2c:27:d7:20:68:8b;
                fixed-address 192.168.1.254;
}
        host machine {
                hardware ethernet 2c:27:d7:24:0a:f9;
                fixed-address 192.168.1.10;
}
}
##############################
log-facility local7;