What on Earth is Session Zero?

evets dranem edranem "at" dranem.org
Wed Nov 2 03:38:01 2005

There is no compatibility problem with XP Home or Pro with RealVNC
The problem is entirely with the current user  setup
from some of the emails I have seen there is absolutely no use for the
firewall router other than sharing the Internet connection it is not
protecting you in the least  according to your description of the
firewall rules]

>Are you running the server on XP Home edition, as this appears to be where
>the incompatibility lies?
In _YOUR_ System the compatibility problem exists
you need to specifically allocate with port /  IP combination is in use

this is entirely demonstrable by connecting machine A to B inside the
same network
ie to

it will work like a charm if the user sets it up properly
It certainly appears to be a problem with your router/firewall

>>Attacking someone's software ("does do only one thing...") while trying
>>to get them to help you is a dubious proposition at best.

>>it's almost certainly
>>something in your environment that's wrong.
>>The fact that it works if someone does an AddClient seems interesting to
>>me, but I think the next that I would try, is to swap the ip addresses
>>between the XP Home and Windows ME machines, and see what happens.  If
>>the problem follows the ip address, then it's clearly something in your
>>router setup.  If it doesn't, then it's something on your XP home
>>machine.  It could be something as simple as desktop control software,
>>some fancy screensaver or desktop add on, or something like that.

>>-----Original Message-----
>>From: vnc-list-admin "at" realvnc.com [mailto:vnc-list-admin "at" realvnc.com] On
>>Behalf Of Stephen
>>Sent: Tuesday, November 01, 2005 5:50 AM
>>To: vnc-list "at" realvnc.com
>>Subject: What on Earth is Session Zero?
>>I am getting really really fed up with RealVNC. All it will ever ever do
>>say Connection Refused Eror 10061, and yes I have checked every single
>>to do with firewalls over and over again, all firewalls are completely
>>RealVNC viewer and server are exceptions in Windows Firewall list
>>The exact same system works with a Windows ME PC on the same router, and
>>the other PC is not switched on, and no I do not use the same port
>>yes the server is running on the XP PC, yes I am accessing the right PC.
>>It DOES work if I phone someone at the other end and get them to
>>the connection with "Add New Client", but it is never possible to
>>from my end with RealVNC viewer, or http in Internet Explorer. Because
>>New Client" is the only thing that has ever worked, it means that the
>>extent of the usefulness of RealVNC is that it can be used if there is
>>someone at the other end 24 hours a day who can be contacted by phone to
>>New Client manually to initiate the connection. This is not how we want
>>remote control software to work.
>>I e-mailed Real VNC's help and support explaining the reality of Real
>>for the ordinary (XP Home) user, "it is a piece of software which can
>>does do only one thing: put a message on the screen which says
>>Refused" - in the REAL world RealVNC does not work." Their reply was,
>>"current releases of VNC Server will only allow session zero to be
>>remotely, and this may best be ensured by disabling Fast User Switching
>>Remote Desktop in some cases. Disabling these features is described in
>>Windows XP documentation, which may be accessed via the "Help and
>>entry in the Start Menu of your Windows XP system."
>>I have disabled Fast User Switching and Remote Desktop, and it has made
>>difference at all. What difference should it make? How is anyone
>>supposed to
>>know what SESSION ZERO is? What is it? I see no mention of session zero
>>Real VNC or in Windows XP Help. If attempting to get RealVNC to work
>>on an understanding of the meaning of "Session Zero", then no ordinary
>>computer user can ever be expected to
>>use RealVNC.
>>Can someone please point me in the direction of a remote control Server
>>which DOES work on Windows XP Home Edition? NOT Real VNC Server, NOT
>>TightVNC Server (I have been down the same path with this and it also
>>refuses to connect), NOT Windows Remote Desktop Server (deliberately
>>disabled by Microsoft in XP Home Edition), NOT Microsoft Netmeeting
>>(also deliberately disabled by Microsoft in XP Home Edition.) Is my
>>because this deliberate disabling also disables Real VNC Server?
>>and should not be advertised as though it is. Has anyone EVER had the
>>control Server running correctly and accepting connections on Windows XP
>>HOME Edition?
>>VNC-List mailing list

Hi Stephen

Remote control software for free that works EXTREMELY  well is REALVNC;
I am sure that  TightVNC UltraVNC also work.

    If you are having that much of a problem go buy PC ANYWHERE.
    {although I am quite sure it won't solve your issue}  and fight with
    the 3 rules required to forward conection to the machine you wish to
    control; don't forget to license both ends of the connection

To answer you question; Yes I have had windows XP Home working with
RealVnc server & vncviewer
Both UserMode & Server Mode;

I have also had it working on Linux  with Linux; Linux with windows 2000
; Linux - windows 2000 server; Linux-windows XP Home; Linux- windows XP Pro;
Windows XP Home --- Windows2000; XPHome--2000 server; XPHome--XP Pro ;
XPHome-- XP Home
XP Pro --  Windows 2000; XPPro--  2000 server;  XP Pro -- XP home

Please Note:
In every case I needed to _correctly_ setup the firewall in use at each
Whether it was Zone alarm, or the Windows XP Built-in firewall, or a
netgear, DLink or Linksys router or  in  any such combination or alone
or with a hardware firewall. they all need to be adjusted to point at
what I want where I want.

It is all about control; you need to maintain it.

Stephen Menard