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Which open source VNC project did you settle on, and what made you stay?
18 Sep 2026, 11:26
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What are you using RealVNC Connect for, and what would you want to ask about it?
18 Sep 2026, 11:26
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Guides
Security and remote access best practices
Exposure, tunneling, and authentication.
The open-source VNC ecosystem
TigerVNC, TightVNC, UltraVNC, noVNC: where each project came from.
The history of VNC
From a Cambridge research lab in the 1990s to a protocol the whole industry still speaks.
Featured
All articlesHow the RFB Protocol Works, From Banner to Pixels
How RFB takes a VNC session from the version banner to pixel rectangles, and which security types, ports and tunnels decide who gets in.
VNC vs SSH: Shell for Most Jobs, Desktop When You Need One
SSH for shell work, VNC when the job needs a desktop, X11 forwarding for one GUI app, and VNC tunnelled over SSH on any network you don't control.
VNC Port Numbers: 5900 Plus the Display, and How to Check Yours
VNC listens on TCP 5900 for display :0 and 5900 plus N for :N, so :1 is 5901. Check the real listener with ss, then open that port or tunnel it over SSH.
Running VNC commercially?
RealVNC Connect is the commercial VNC from the team that created the protocol, with end-to-end encrypted sessions and multi-factor authentication built in.