What is VNC (Virtual Network Computing)? Secure Remote Access to Industrial HMIs & Operator Panels

VNC PROTOCOL HMI REMOTE ACCESS EDGE COMPUTING NODE-RED

VNC (Virtual Network Computing) is a platform-independent graphical desktop-sharing technology that allows you to remotely control and manage applications on a networked device with a graphical interface, either over a local network or via the internet.

How Does VNC Architecture and the RFB Protocol Work?

VNC technology relies on a Server and Client interaction. A VNC Server is installed on the remote device (Operator Panel, Industrial PC, Notebook), while a VNC Client is set up on the connecting device (PC, Tablet, Mobile Phone). The VNC Server transmits the live graphical interface of the host device to the VNC Client as a display stream using the RFB (Remote Framebuffer) protocol.

1
Authentication: When the VNC Client connects to the server, a secure identity verification process is initiated.
2
Parameter Exchange: Following authentication, desktop layout and pixel format requests are communicated from client to server.
3
Full Graphical Control: The remote screen appears live on the client interface; keyboard and mouse inputs allow full control as if standing right in front of the machine.
HUBBOX SECURE VNC AND EDGE ACCESS ARCHITECTURE

VNC Client
➔

HUBBOX Cloud VPN
➔

HUBBOX X1 / X2
➔

Field HMI / Panel

Secure Industrial VNC with HUBBOX Connect X1 and Connect X2

Unencrypted standard VNC connections pose severe cybersecurity vulnerabilities when exposed to public networks. HUBBOX encapsulates VNC traffic inside encrypted tunnels, providing seamless and secure remote access to your operator panels (HMIs) globally.

HUBBOX CONNECT X1 Plug-and-Play HMI & VNC Access Access your field machines and HMI panels via VNC over an encrypted VPN with a single click, eliminating port forwarding complications entirely.
HUBBOX CONNECT X2 Edge Computing & Node-RED Integration Empowered by X2's Edge Computing capability, process your data at the edge, create custom visual flows using built-in Node-RED, and route metrics to cloud IoT platforms while managing your VNC screens simultaneously.
Cybersecurity Warning: Direct exposure of the VNC protocol to the public internet creates major security risks. The HUBBOX Connect series isolates VNC traffic behind end-to-end encrypted tunnels and digital certificates, completely blocking unauthorized cyber intrusions.

Latest Resources

Transform industrial data at the Edge with HUBBOX Connect X2. Seamlessly converge OT and IT using Docker, Node-RED, a...
MQTT protocol is a communication protocol designed for widespread use of IoT devices. It is a protocol designed to ca...
Remote access; It is the general name given to the methods that allow you to connect and manage information systems l...
VNC (Virtual Network Computing) enables a network device containing graphics applications to be used and managed remo...
SCADA (Supervisory Control And Data Acquisition), translated as “Supervisory Control And Data Acquisition”. SCADA sys...
Offline Data Collection with Edge Computing: HUBBOX X1 and X2 Series
HUBBOX works to support many industrial protocols used today in the device and software systems it develops.
IoT (Internet of Things) technologies, which is the Internet of Things, are developing more and more in our lives.