What on Earth is Session Zero?

James Weatherall jnw "at" realvnc.com
Tue Nov 1 22:38:00 2005


Stephen,

What are you entering into the Server box in the Connection Details dialog
when attempting to connect to the Windows XP system?

Regards,

Wez @ RealVNC Ltd.


> -----Original Message-----
> From: vnc-list-admin "at" realvnc.com 
> [mailto:vnc-list-admin "at" realvnc.com] On Behalf Of Stephen
> Sent: 01 November 2005 19:22
> To: Steven D. Clark
> Cc: vnc-list "at" realvnc.com
> Subject: Re: What on Earth is Session Zero?
> 
> 
> ----- Original Message -----
> From: "Steven D. Clark" <sdclark "at" cnrgroup.com>
> To: <vnc-list "at" realvnc.com>
> Sent: Tuesday, November 01, 2005 3:53 PM
> Subject: Re: What on Earth is Session Zero?
> 
> > Does XP Home allow you to run "netstat -a" in a command window? You 
> > should see the following lines if VNC is listening:
> >
> >   TCP    <name-of-xp-box>:5800     <name-of-xp-box>:0       
>  LISTENING
> >   TCP    <name-of-xp-box>:5900     <name-of-xp-box>:0       
>  LISTENING
> 
> Yes it does. Below is my result from netstat -a on the XP 
> PC.This was after connecting it with "Add New Client" from 
> the remote end, and starting up Windows Media Encoder on Port 
> 8080. The RealVNC ports are 5920 and 5820. A Windows ME 
> computer (192.168.0.2 on the router also at the remote end) 
> uses Real VNC on 5900 and 5800 when it is on, and I CAN get 
> into to that one with RealVNC Viewer. The refusal to connect 
> on the XP PC I need (192.168.0.3 on the router at the remote 
> end) does not change whether the ME PC is on or off. The 
> router is configured to allow everything inbound to both as here:
> 
> Inbound Services
>  #  Enable  Service Name  Action  LAN Server IP address  WAN 
> Users  Log
>  1   Yes Any(ALL)  ALLOW always  192.168.0.2  Any  Always
>  2   Yes Any(ALL)  ALLOW always  192.168.0.3  Any  Always
>  Default  Yes  Any  BLOCK always  Any  Any  Never
> 
> netstat -a
> Active Connections
> 
>   Proto  Local Address           Foreign Address        State
>   TCP    YOUR-91C305C62F:epmap   YOUR-91C305C62F:0      LISTENING
>   TCP    YOUR-91C305C62F:microsoft-ds   YOUR-91C305C62F:0     
>  LISTENING
>   TCP    YOUR-91C305C62F:2869    YOUR-91C305C62F:0      LISTENING
>   TCP    YOUR-91C305C62F:5820    YOUR-91C305C62F:0      LISTENING
>   TCP    YOUR-91C305C62F:5920    YOUR-91C305C62F:0      LISTENING
>   TCP    YOUR-91C305C62F:8080    YOUR-91C305C62F:0      LISTENING
>   TCP    YOUR-91C305C62F:1028    YOUR-91C305C62F:0      LISTENING
>   TCP    YOUR-91C305C62F:netbios-ssn   YOUR-91C305C62F:0      
> LISTENING
>   TCP    YOUR-91C305C62F:1049    sptv.demon.co.uk:5500  ESTABLISHED
>   TCP    YOUR-91C305C62F:8080    sptv.demon.co.uk:1159  ESTABLISHED
>   TCP    YOUR-91C305C62F:8080    sptv.demon.co.uk:1174  FIN_WAIT_2
>   UDP    YOUR-91C305C62F:microsoft-ds   *:*
>   UDP    YOUR-91C305C62F:isakmp   *:*
>   UDP    YOUR-91C305C62F:1069    *:*
>   UDP    YOUR-91C305C62F:4500    *:*
>   UDP    YOUR-91C305C62F:ntp     *:*
>   UDP    YOUR-91C305C62F:1035    *:*
>   UDP    YOUR-91C305C62F:1900    *:*
>   UDP    YOUR-91C305C62F:ntp     *:*
>   UDP    YOUR-91C305C62F:netbios-ns   *:*
>   UDP    YOUR-91C305C62F:netbios-dgm   *:*
>   UDP    YOUR-91C305C62F:1900    *:*
> 
> 
> > ----- Original Message -----
> > From: "John Aldrich" <JAldrich "at" covista.com>
> > To: "'Stephen'" <stephen "at" sptv.demon.co.uk>; <vnc-list "at" realvnc.com>
> > Sent: Tuesday, November 01, 2005 8:16 AM
> > Subject: RE: What on Earth is Session Zero?
> >
> >
> > > Stephen:
> > > Are you running any antivirus software, such as "Norton Internet
> > Security"?
> > > There is sufficient anecdotal evidence that some 
> antivirus products
> > actively
> > > block VNC because they perceive it as "malware" due to 
> the fact that 
> > > it could be misused.
> > >
> > > The first thing I would try is to connect from your 
> Windows ME box 
> > > to
> your
> > > XP box and see if that works. If it doesn't, try the following: 
> > > Start ->Run ->Telnet <ip.of.xp.box> 5900 and see if you 
> get an "RFB" 
> > > prompt. If you don't, then your machine is
> not
> > > accepting connections. My XP Pro box appears to be having the same
> > problem,
> > > but I'm not blaming it on VNC, because it works fine on other XP 
> > > boxes. _______________________________________________
> > > VNC-List mailing list
> > > VNC-List "at" realvnc.com
> > > To remove yourself from the list visit: 
> > > http://www.realvnc.com/mailman/listinfo/vnc-list
> > _______________________________________________
> > VNC-List mailing list
> > VNC-List "at" realvnc.com
> > To remove yourself from the list visit: 
> > http://www.realvnc.com/mailman/listinfo/vnc-list
> _______________________________________________
> VNC-List mailing list
> VNC-List "at" realvnc.com
> To remove yourself from the list visit: 
> http://www.realvnc.com/mailman/listinfo/vnc-list