virtual box: File/Perferences/network/Adapter/ 192.168.1.3>>255.25.255.0 DHCP server: 192.168.2.100>>255.255.255.0>>192.168.2.101>>192.168.2.254 Pfsense: dhclient em0 >> dhclient em1 ubuntu: dhclient eth0 >> route add -net 192.168.2.0 netmask 255.255.255.0 gw 192.168.2.101 dev eth0