What on Earth is Session Zero?
Stephen
stephen "at" sptv.demon.co.uk
Tue Nov 1 19:22:03 2005
----- 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.
> > _______________________________________________
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