Debian 11 Bullseye
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Desktop Environment : Install noVNC
2021/08/19
 
Install noVNC which is a VNC Client tool to connect to VNC server via Web Browser.
[1] Install required packages.
root@dlp:~#
apt -y install novnc python3-websockify
[2]
Start VNC Server with a user, refer to here.
This example is based on that [debian] user runs VNC server with [5901] port.
[3] Login as a user who runs VNC and create certificates, and then Start Websockify to proxy [localhost:5901] on port [6080].
debian@dlp:~$
openssl req -x509 -nodes -newkey rsa:3072 -keyout novnc.pem -out novnc.pem -days 3650

Generating a RSA private key
..............++++
..++++
writing new private key to 'novnc.pem'
-----
You are about to be asked to enter information that will be incorporated
into your certificate request.
What you are about to enter is what is called a Distinguished Name or a DN.
There are quite a few fields but you can leave some blank
For some fields there will be a default value,
If you enter '.', the field will be left blank.
-----
Country Name (2 letter code) [AU]:JP                            # country code
State or Province Name (full name) [Some-State]:Hiroshima       # state
Locality Name (eg, city) []:Hiroshima                           # city
Organization Name (eg, company) [Internet Widgits Pty Ltd]:GTS  # company
Organizational Unit Name (eg, section) []:Server World          # department
Common Name (e.g. server FQDN or YOUR name) []:dlp.srv.world    # server's FQDN
Email Address []:debian@srv.world                               # admin email

debian@dlp:~$
websockify -D --web=/usr/share/novnc/ --cert=/home/debian/novnc.pem 6080 localhost:5901

WebSocket server settings:
  - Listen on :6080
  - Web server. Web root: /usr/share/novnc
  - SSL/TLS support
  - Backgrounding (daemon)
[4] Access to the [https://(server's hostname or IP address):6080/vnc.html] from a client computer with web browser, then noVNC form is displayed like follows, Click [Connect] to proceed.
[5] Password is required. Input VNC password of the user.
[6] If successfully passed authentication, VNC session starts and it's possible to operate Debian on Web browser.
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