VNC Server is not licensed correctly

So I am trying to make a connection from a macOS RealVNC client   (which I use frequently )  to a new RealVNC server system on Linux that I installed today.


On the Linux server side I am licensed like this


# vnclicense -check

No licenses installed.

# vnclicense -list

VNC Server is licensed through subscription.



When I try accessing this Linux system from my client it asks me to logon with userid and password and then  I get the above error message.

I note that using netstat command under linux reveals the fact that the server there is using port 5999 not the more usual 5900 or 5901.   If I try to connect from the client macOS explicitly using ports 5900 or 5901 I don't get anywhere i.e. there is no request to logon as it can't find anything to talk to


Also at the Linux Server end ...

# ps -ef | grep -i vnc

root       440     1  0 00:34 ?        00:00:00 /usr/bin/vncserver-virtuald -fg

root       441     1  0 00:34 ?        00:00:00 /usr/bin/vncserver-x11-serviced -fg

root       456   441  0 00:34 ?        00:00:00 /usr/bin/vncserver-x11-core -service

root       588   456  0 00:34 ?        00:00:00 /usr/bin/vncagent service 0

m          921   456  0 00:35 ?        00:00:00 /usr/bin/vncserverui service 0

m          922   921  0 00:35 ?        00:00:00 /usr/bin/vncserverui -statusicon 0

root      2281  1683  0 01:13 pts/0    00:00:00 grep -i vnc



Why is that.

Frustrated!   Anybody?







1 comment
  • Official comment


    Thanks for your post! Port 5999 is for VNC Server's Virtual Mode daemon which requires an Enterprise subscription to use. From the vnclicense output it looks like you have either a Home or Professional subscription, since no license key has been applied as part of the subscription.

    This means to get connected, you'll need to sign in to VNC Viewer using the same RealVNC account you used to sign in to VNC Server, then connect using the Team section of VNC Viewer.

    I hope this helps!


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