| 1 | <?xml version='1.0' encoding='UTF-8'?>
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| 2 | <!DOCTYPE topic PUBLIC "-//OASIS//DTD DITA Topic//EN" "topic.dtd">
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| 3 | <topic xml:lang="en-us" id="vrde">
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| 4 | <title>Remote Display (VRDP Support)</title>
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| 5 |
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| 6 | <body>
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| 7 | <p>
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| 8 | Oracle VM VirtualBox can display virtual machines remotely, meaning that
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| 9 | a virtual machine can execute on one computer even though the
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| 10 | machine will be displayed on a second computer, and the machine
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| 11 | will be controlled from there as well, as if the virtual machine
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| 12 | was running on that second computer.
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| 13 | </p>
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| 14 | <p>
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| 15 | For maximum flexibility, Oracle VM VirtualBox implements remote machine
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| 16 | display through a generic extension interface called the
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| 17 | VirtualBox Remote Desktop Extension (VRDE). The base open source
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| 18 | Oracle VM VirtualBox package only provides this interface, while
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| 19 | implementations can be supplied by third parties with
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| 20 | Oracle VM VirtualBox extension packages, which must be installed
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| 21 | separately from the base package. See
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| 22 | <xref href="intro-installing.dita">Installing Oracle VM VirtualBox and Extension Packs</xref>.
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| 23 | </p>
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| 24 | <p>
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| 25 | Oracle provides support for the VirtualBox Remote Display Protocol
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| 26 | (VRDP) in such an Oracle VM VirtualBox extension package.
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| 27 | </p>
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| 28 | <p>
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| 29 | VRDP is a backwards-compatible extension to Microsoft's Remote
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| 30 | Desktop Protocol (RDP). As a result, you can use any standard RDP
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| 31 | client to control the remote VM.
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| 32 | </p>
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| 33 | <p>
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| 34 | Even when the extension is installed, the VRDP server is disabled
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| 35 | by default. It can easily be enabled on a per-VM basis either from
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| 36 | VirtualBox Manager in the <b outputclass="bold">Display</b>
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| 37 | settings, see <xref href="settings-display.dita">Display Settings</xref>, or with the
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| 38 | <userinput>VBoxManage</userinput> command, as follows:
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| 39 | </p>
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| 40 | <pre xml:space="preserve">$ VBoxManage modifyvm <varname>VM-name</varname> --vrde on</pre>
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| 41 | <p>
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| 42 | By default, the VRDP server uses TCP port <codeph>3389</codeph>.
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| 43 | You will need to change the default port if you run more than one
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| 44 | VRDP server, since the port can only be used by one server at a
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| 45 | time. You might also need to change it on Windows hosts since the
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| 46 | default port might already be used by the RDP server that is built
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| 47 | into Windows itself. Ports 5000 through 5050 are typically not
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| 48 | used and might be a good choice.
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| 49 | </p>
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| 50 | <p>
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| 51 | The port can be changed either in the
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| 52 | <b outputclass="bold">Display</b> settings of the graphical
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| 53 | user interface or with the <codeph>--vrde-port</codeph> option of
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| 54 | the <userinput>VBoxManage modifyvm</userinput> command. You can
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| 55 | specify a comma-separated list of ports or ranges of ports. Use a
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| 56 | dash between two port numbers to specify a range. The VRDP server
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| 57 | will bind to <i>one</i> of the available ports from
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| 58 | the specified list. For example, <userinput>VBoxManage modifyvm
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| 59 | <varname>VM-name</varname> --vrde-port
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| 60 | 5000,5010-5012</userinput> configures the server to bind to one of
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| 61 | the ports 5000, 5010, 5011, or 5012. See
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| 62 | <xref href="man_VBoxManage-modifyvm.dita">VBoxManage modifyvm</xref>.
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| 63 | </p>
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| 64 | <p>
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| 65 | The actual port used by a running VM can be either queried with
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| 66 | the <userinput>VBoxManage showvminfo</userinput> command or seen in
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| 67 | VirtualBox Manager on the <b outputclass="bold">Runtime</b> tab of
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| 68 | the <b outputclass="bold">Session Information</b> dialog,
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| 69 | which is accessible from the
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| 70 | <b outputclass="bold">Machine</b> menu of the VM window.
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| 71 | </p>
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| 72 | <p>
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| 73 | Oracle VM VirtualBox supports IPv6. If the host OS supports IPv6 the
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| 74 | VRDP server will automatically listen for IPv6 connections in
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| 75 | addition to IPv4.
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| 76 | </p>
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| 77 | </body>
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| 78 | </topic>
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