Setting SSH+DHCP on FreeBSD
rc.conf
# Created: Wed Oct 12 05:11:14 2011
# Enable network daemons for user convenience.
# Please make all changes to this file, not to /etc/defaults/rc.conf.
# This file now contains just the overrides from /etc/defaults/rc.conf.
synchronous_dhclient="YES"
#ifconfig_em0="dhcp"
ifconfig_em0="inet 172.16.4.50 netmask 255.255.240.0"
defaultrouter="172.16.0.1"
sshd_enable="Yes"
ftpd_enable="Yes"
usbd_enable="YES"