edit /etc/rc.conf
something like this might work
Code:
lo="lo 127.0.0.1"
eth0="eth0 192.168.1.101 netmask 255.255.255.0 broadcast 192.168.0.255"
#eth0="dhcp"
INTERFACES=(lo eth0)
gateway="default gw 192.168.1.1"
ROUTES=(gateway)
just change 192.168.1.101 to the ip address of your machine
and 192.168.1.1 to the ip adress of the router
then edit /etc/resolve.conf and add some dns server to it