Remotely connect an Ubuntu virtual machine via the XRDP protocol

Here's how to set up an Ubuntu virtual machine to allow other machines to connect remotely. The steps here are for ubuntu12.04.

Step 1: Install the XRDP protocol

sudo apt-get install xrdp vnc4server xbase-clients

Step 2: Set up remote sharing

Open the desktop Sharing in the/usr/share/applications directory and set the following:

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* For ubuntu14.04 and above, secure access settings are required:

1. Install Dconf-editor:

sudo apt-get install Dconf-editor

2. Counter-select prompt-enabled and require-encryption:

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Step 3: Set iptables port mappings

Since XRDP is connected using port 3389, the extranet is not able to connect directly to the Ubuntu virtual machine, so you need to set up the iptables port mapping in the host.

1. View the network information in the virtual machine:

Terminal Invoke command: Nm-tool

You can see the IP address and the gateway address.

2. Set Iptables port mapping rules

IPTABLES-T nat-i prerouting-d Host IP address-p TCP--dport 33899-j DNAT--to-destination virtual machine IP address: 3389

IPTABLES-T nat-i postrouting-d Virtual machine IP address-p TCP--dport-j SNAT--to gateway address

* 33899 in the first rule above is not fixed, you can use any unused port

Step 4: Connect an Ubuntu virtual machine using the Remote connection tool

The address at the time of connection is: Host IP address: 33899

* Note 33899 This port needs to be consistent with the ports used in the previous setup Iptables port mapping rules

With the 4 steps above, we can remotely connect to a virtual machine from the outside network

Remotely connect an Ubuntu virtual machine via the XRDP protocol