Edit file /etc/rc.conf, tambahkan baris berikut :

usbd_enable="NO"
background_fsck="NO"
update_motd="NO"
syslogd_flags="-ss"
accounting_enable="YES"
clear_tmp_enable="YES"
nfs_reserved_port_only="YES"

Edit file /boot/loader.conf, tambahkan baris berikut :
autoboot_delay="3"
kern.ipc.maxsockets=16384

Edit file /etc/sysctl.conf, tambahkan baris berikut :
security.bsd.see_other_uids=0
net.inet.tcp.sendspace=65536
net.inet.tcp.recvspace=65536
kern.ipc.somaxconn=2048
net.inet.icmp.drop_redirect=1
net.inet.icmp.log_redirect=0
net.inet.ip.redirect=0
kern.maxfiles=112328
kern.maxfilesperproc=31095
net.inet.tcp.blackhole=1
net.inet.udp.blackhole=1
net.inet.icmp.icmplim_output=0
net.inet.tcp.msl=3000
vfs.read_max=64
vfs.lorunningspace=6291456
vfs.hirunningspace=12388608
vfs.ufs.dirhash_maxmem=38554432

Aktifkan seluruh konfigurasi dengan me-reboot mesin :
server# reboot

Source Aslinya : http://www.devilian.net/2009/09/optimasi-server-freebsd/