====== Remote GUI Desktops ======

**General Information**

Remote desktop application setup. 

**Checklist**
  * Pre-req: [[linux_wiki:gui_desktops|Install a GUI desktop]] on the remote server.

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====== X2Go ======

X2Go is "an open source remote desktop software for Linux that uses the NX technology protocol".
  * Official Site: https://wiki.x2go.org/doku.php

\\
===== X2Go: Install =====

**Desktop Environment Compatibility**
  * Compatible, No Workarounds
    * LXDE
    * XFCE
    * MATE
  * Compatible, with Workarounds
    * KDE 5 (plasma) -> very slow
    * Cinnamon -> Buggy, requires fallback mode
  * More Details: https://wiki.x2go.org/doku.php/doc:de-compat

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==== X2Go: Install on Servers ====

  * **CentOS 6 and 7**: Install x2go server<code bash>yum install fuse-sshfs x2goserver x2goserver-xsession</code>
    * Note: There is no service to start, as the x2go clients connect via ssh and use the NX protocol to forward the graphical display.

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==== X2Go: Install on Clients ====
  * Download the last client from: https://wiki.x2go.org/doku.php/download:start
  * Follow online instructions and launch client after install

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===== X2Go: Configure =====

Configuring x2go.

X2Go config files are located:
  * /etc/x2go/

**Server: Fix for atom/other text editors crashing connected via X2GoClient**
  * Edit server side config file (/etc/x2go/x2goagent.options) and append<code bash>#- Fix for Atom Crashing: https://github.com/atom/atom/issues/4360 -#
X2GO_NXAGENT_DEFAULT_OPTIONS+=" -extension BIG-REQUESTS"</code>

**Client: Fix for Windows Firewall Messages Popping Up**
  * Windows Firewall messages pop up about various features being blocked during connection. To make these go away, some X2GoClient session features can be disabled.
  * X2Go Client Window: Session > Session management...
    * Select your saved session > click Session preferences
      * Click the Media tab
        * Uncheck "Enable sound support"
        * Uncheck "Client side printing support"
        * Click "Ok"
      * On Session Management, Click "Exit"

**Client: Performance Settings**
  * Various performance settings in the X2Go Client
    * Session Preferences
      * Connection tab
        * Connection Speed: Adjust to connection speed
        * Compression Method and Quality

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====== XRDP ======

xrdp runs on a Linux system and allows for native Windows RDP to connect to it.

**Note:** xrdp checks only if a session with the same geometry is already opened. It will start a new session if the geometry/resolution doesn't match. This means if you connect using an external monitor initially, and resume with a different monitor with different resolution being sent, you will get a new session. Resolution settings are configurable via the RDP client display settings. (Full screen is the default)

===== XRDP: Install =====

Install xrdp
<code bash>
yum install xrdp
</code>

===== XRDP: Configure =====

**Performance Settings**

  * Change xrdp bpp to 16 (/etc/xrdp/xrdp.ini)<code bash>sed -i 's/max_bpp=32/max_bpp=16/' /etc/xrdp/xrdp.ini</code>
  * Increase Max Sessions (/etc/xrdp/sesman.ini)<code bash>sed -i 's/MaxSessions=10/MaxSessions=50/' /etc/xrdp/sesman.ini</code>

**Security Settings**

  * Only Allows TLS1.2<code bash>sed -i 's/ssl_protocols=.*/ssl_protocols=TLSv1.2/' /etc/xrdp/xrdp.ini</code>
  * Set Ciphers to AES<code bash>sed -i 's/#*tls_ciphers=.*/tls_ciphers=AES/' /etc/xrdp/xrdp.ini</code>

**Log Settings**

  * Set logging levels to warning instead of debug<code bash>sed -i 's/LogLevel=.*/LogLevel=WARNING/' /etc/xrdp/xrdp.ini
sed -i 's/SyslogLevel=.*/SyslogLevel=WARNING/' /etc/xrdp/xrdp.ini</code>

**PATH Settings**
  * Add 'source /etc/profile' to xrdp's start script to get login PATH settings<code bash>vim /etc/xrdp/startwm.sh

if [ -f /etc/X11/xinit/xinitrc ]
then
    source /etc/profile
    . /etc/X11/xinit/xinitrc
    exit 0
fi</code>

Restart and enable xrdp
<code bash>
systemctl restart xrdp
systemctl enable xrdp
</code>

Ensure we are still starting the server in multi-user (no gui), change if not
<code bash>
systemctl get-default
systemctl set-default multi-user.target
</code>

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