FreeBSD works well as a guest in VirtualBox™. The virtualization software is available for most common operating systems, including FreeBSD itself.

The VirtualBox™ guest additions provide support for:

First, install the emulators/virtualbox-ose-additions package or port in the FreeBSD guest. This will install the port:

# cd /usr/ports/emulators/virtualbox-ose-additions && make install clean

Add these lines to /etc/rc.conf:

vboxguest_enable="YES"
vboxservice_enable="YES"

If ntpd(8) or ntpdate(8) is used, disable host time synchronization:

vboxservice_flags="--disable-timesync"

Xorg will automatically recognize the vboxvideo driver. It can also be manually entered in /etc/X11/xorg.conf:

Section "Device"
	Identifier "Card0"
	Driver "vboxvideo"
	VendorName "InnoTek Systemberatung GmbH"
	BoardName "VirtualBox Graphics Adapter"
EndSection

To use the vboxmouse driver, adjust the mouse section in /etc/X11/xorg.conf:

Section "InputDevice"
	Identifier "Mouse0"
	Driver "vboxmouse"
EndSection

HAL users should create the following /usr/local/etc/hal/fdi/policy/90-vboxguest.fdi or copy it from /usr/local/share/hal/fdi/policy/10osvendor/90-vboxguest.fdi:

<?xml version="1.0" encoding="utf-8"?>
<!--
# Sun VirtualBox
# Hal driver description for the vboxmouse driver
# $Id: chapter.xml,v 1.33 2012-03-17 04:53:52 eadler Exp $

	Copyright (C) 2008-2009 Sun Microsystems, Inc.

	This file is part of VirtualBox Open Source Edition (OSE, as
	available from http://www.virtualbox.org. This file is free software;
	you can redistribute it and/or modify it under the terms of the GNU
	General Public License (GPL) as published by the Free Software
	Foundation, in version 2 as it comes in the "COPYING" file of the
	VirtualBox OSE distribution. VirtualBox OSE is distributed in the
	hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.

	Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
	Clara, CA 95054 USA or visit http://www.sun.com if you need
	additional information or have any questions.
-->
<deviceinfo version="0.2">
  <device>
    <match key="info.subsystem" string="pci">
      <match key="info.product" string="VirtualBox guest Service">
        <append key="info.capabilities" type="strlist">input</append>
	<append key="info.capabilities" type="strlist">input.mouse</append>
        <merge key="input.x11_driver" type="string">vboxmouse</merge>
	<merge key="input.device" type="string">/dev/vboxguest</merge>
      </match>
    </match>
  </device>
</deviceinfo>