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<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE topic PUBLIC "-//OASIS//DTD DITA Topic//EN" "topic.dtd">
<topic xml:lang="en-us" id="networkingmodes">
<title>Introduction to Networking Modes</title>
<body>
<p>
Each of the networking adapters can be separately configured to
operate in one of the following modes:
</p>
<ul>
<li>
<p><b outputclass="bold">Not attached.</b> In this mode,
Oracle VM VirtualBox reports to the guest that a network card is
present, but that there is no connection. This is as if no
Ethernet cable was plugged into the card. Using this mode, it
is possible to <i>pull</i> the virtual Ethernet
cable and disrupt the connection, which can be useful to
inform a guest operating system that no network connection is
available and enforce a reconfiguration.
</p>
</li>
<li>
<p><b outputclass="bold">Network Address Translation
(NAT)</b>. If all you want is to browse the Web,
download files, and view email inside the guest, then this
default mode should be sufficient for you, and you can skip
the rest of this section. Please note that there are certain
limitations when using Windows file sharing. See
<xref href="nat-limitations.dita#nat-limitations"/>.
</p>
</li>
<li>
<p><b outputclass="bold">NAT Network.</b> A NAT network is
a type of internal network that allows outbound connections.
See <xref href="network_nat_service.dita#network_nat_service"/>.
</p>
</li>
<li>
<p><b outputclass="bold">Bridged networking.</b> This is
for more advanced networking needs, such as network
simulations and running servers in a guest. When enabled,
Oracle VM VirtualBox connects to one of your installed network cards
and exchanges network packets directly, circumventing your
host operating system's network stack.
</p>
</li>
<li>
<p><b outputclass="bold">Internal networking.</b> This can
be used to create a different kind of software-based network
which is visible to selected virtual machines, but not to
applications running on the host or to the outside world.
</p>
</li>
<li>
<p><b outputclass="bold">Host-only networking.</b> This
can be used to create a network containing the host and a set
of virtual machines, without the need for the host's physical
network interface. Instead, a virtual network interface,
similar to a loopback interface, is created on the host,
providing connectivity among virtual machines and the host.
</p>
</li>
<li>
<p><b outputclass="bold">Cloud networking.</b> This can be
used to connect a local VM to a subnet on a remote cloud
service.
</p>
</li>
<li>
<p><b outputclass="bold"> Generic networking.</b> Rarely
used modes which share the same generic network interface, by
allowing the user to select a driver which can be included
with Oracle VM VirtualBox or be distributed in an extension pack.
</p>
<p>
The following sub-modes are available:
</p>
<ul>
<li>
<p><b outputclass="bold">UDP Tunnel:</b> Used to
interconnect virtual machines running on different hosts
directly, easily, and transparently, over an existing
network infrastructure.
</p>
</li>
<li>
<p><b outputclass="bold">VDE (Virtual Distributed Ethernet)
networking:</b> Used to connect to a Virtual
Distributed Ethernet switch on a Linux or a FreeBSD host.
At the moment this option requires compilation of
Oracle VM VirtualBox from sources, as the Oracle packages do not
include it.
</p>
</li>
</ul>
</li>
</ul>
<p>
The following table provides an overview of the most important
networking modes.
</p>
<table id="table-networking-modes">
<title>Overview of Networking Modes</title>
<desc>Overview of Networking Modes</desc>
<tgroup cols="6">
<colspec align="left"/>
<colspec align="center"/>
<colspec align="center"/>
<colspec align="center"/>
<colspec align="center"/>
<colspec align="center"/>
<thead valign="middle">
<row>
<entry>
<b outputclass="bold">Mode</b>
</entry>
<entry>
<p>
<b outputclass="bold">VM→Host</b>
</p>
</entry>
<entry>
<p>
<b outputclass="bold">VM←Host</b>
</p>
</entry>
<entry>
<p>
<b outputclass="bold">VM1↔VM2</b>
</p>
</entry>
<entry>
<p>
<b outputclass="bold">VM→Net/LAN</b>
</p>
</entry>
<entry>
<p>
<b outputclass="bold">VM←Net/LAN</b>
</p>
</entry>
</row>
</thead>
<tbody valign="middle">
<row>
<entry>
<p>
Host-only
</p>
</entry>
<entry>
<p>
<b outputclass="bold">+</b>
</p>
</entry>
<entry>
<p>
<b outputclass="bold">+</b>
</p>
</entry>
<entry align="center">
<p>
<b outputclass="bold">+</b>
</p>
</entry>
<entry>
<p>
–
</p>
</entry>
<entry>
<p>
–
</p>
</entry>
</row>
<row>
<entry>
<p>
Internal
</p>
</entry>
<entry>
<p>
–
</p>
</entry>
<entry>
<p>
–
</p>
</entry>
<entry>
<p>
<b outputclass="bold">+</b>
</p>
</entry>
<entry>
<p>
–
</p>
</entry>
<entry>
<p>
–
</p>
</entry>
</row>
<row>
<entry>
<p>
Bridged
</p>
</entry>
<entry>
<p>
<b outputclass="bold">+</b>
</p>
</entry>
<entry>
<p>
<b outputclass="bold">+</b>
</p>
</entry>
<entry>
<p>
<b outputclass="bold">+</b>
</p>
</entry>
<entry>
<p>
<b outputclass="bold">+</b>
</p>
</entry>
<entry>
<p>
<b outputclass="bold">+</b>
</p>
</entry>
</row>
<row>
<entry>
<p>
NAT
</p>
</entry>
<entry>
<p>
<b outputclass="bold">+</b>
</p>
</entry>
<entry>
<p>
<xref href="natforward.dita#natforward">Port forward</xref>
</p>
</entry>
<entry>
<p>
–
</p>
</entry>
<entry>
<p>
<b outputclass="bold">+</b>
</p>
</entry>
<entry>
<p>
<xref href="natforward.dita#natforward">Port forward</xref>
</p>
</entry>
</row>
<row>
<entry>
<p>
NATservice
</p>
</entry>
<entry>
<p>
<b outputclass="bold">+</b>
</p>
</entry>
<entry>
<p>
<xref href="network_nat_service.dita#network_nat_service">Port forward</xref>
</p>
</entry>
<entry>
<p>
<b outputclass="bold">+</b>
</p>
</entry>
<entry>
<p>
<b outputclass="bold">+</b>
</p>
</entry>
<entry>
<p>
<xref href="network_nat_service.dita#network_nat_service">Port forward</xref>
</p>
</entry>
</row>
</tbody>
</tgroup>
</table>
<p>
The following sections describe the available network modes in
more detail.
</p>
</body>
</topic>
|
