/etc/network/interfaces

# Konfigurasi loopback
auto lo
iface lo inet loopback

# Konfigurasi eth1
auto eth1
iface eth1 inet dhcp
#        address 192.168.1.50
#        netmask 255.255.255.0
#        network 192.168.1.0
#        broadcast 192.168.1.255
#	 gateway 192.168.1.1
#	 dns-nameservers 192.168.1.1