etc/network/interfaces

# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto eth1
iface eth1 inet static
address 192.168.1.110
netmask 225.225.225.0
gateway 192.168.1.1
# This is an autoconfigured IPv6 interface
iface eth1 inet6 auto