Manually assign/add fixed/static IP on FreeBSD:
ifconfig em0 inet netmask
route add default
/etc/netstart
e.g.
ifconfig em0 inet 192.168.0.10 netmask 255.255.255.0
route add default 192.168.0.1
/etc/netstart
Make changes permanently :
As an example of the above, insert the below parameters into /etc/rc.conf :
ifconfig_em0="inet 192.168.0.10 netmask 255.255.255.0"
defaultrouter="192.168.0.1"
hostname="hostname.domain.com"
Remove assigned IP address from network interface
ifconfig down delete
e.g.ifconfig em0 down delete