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Mark Notley | 1 Mar 2007 11:34

Feature queries

Hi,

            I have been looking into using TightVNC on a fairly large
number of machines and I was hoping that someone could, if at all
possible, spare a moment to answer a couple of feature queries I have
regarding the software:

1.       Does TightVNC support Windows Logon Authentication? I.e. can
the software use standard Windows users / passwords, rather than having
to create   separate passwords for the software?

2.       Is it possible to blank out the remote screen?

3.       What sort of CPU usage does TightVNC generate on the remote
machine?

If anyone could answer these questions it would be much appreciated,

Thank you

Mark Notley | Support Engineer
Inspiration Matters Ltd | 160-166 Borough High Street | London | SE1 1LB
| UK
T +44 (0)20 7173 5457 | F +44 (0)20 7173 5001
mark <at> inspirationmatters.com | <mailto:mark <at> inspirationmatters.com%20|>
www.inspiredsignage.com <http://www.inspiredsignage.com/>
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James Weatherall | 1 Mar 2007 12:22
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RE: vncviewer toggle full screen option command and -xrm option

Hi Magesh,

> 1) Is there any way to toggle full sceen mode using a
> command in a bash shell instead of pressing F8 and
> selecing full screen mode. For example is it possiblef
> for a program (say a simple c progam or a bash
> script), to toggle the vncviewer between full screen
> mode and normal mode without my manual keyboard
> instruction 

No, there isn't.

> 2) when i run vncviewer with -xrm option i get an
> error as unrecognised option.

That's because vncviewer does not have a "-xrm" command-line option! :)

Regards,

Wez  <at>  RealVNC Ltd
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James Weatherall | 1 Mar 2007 12:27
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RE: Feature queries

Hi Mark,

> 1.       Does TightVNC support Windows Logon Authentication? I.e. can
> the software use standard Windows users / passwords, rather 
> than having
> to create   separate passwords for the software?

TightVNC is based on our old VNC 3 codebase, which doesn't support native
Windows authentication, but it's possible that Const has introduced
functionality of that sort.  VNC Enterprise Edition does support native
Windows NT authentication, and Single Sign-On on systems capable of
supporting it.

> 2.       Is it possible to blank out the remote screen?

VNC Enterprise & Personal Editions currently support this.  If I remember
correctly, TightVNC does too, but implements it by activating monitor
power-saving, which has the potential to do very bad things to the graphics
card and/or monitor of the system being controlled.

> 3.       What sort of CPU usage does TightVNC generate on the remote
> machine?

As with the standard VNC releases, that will depend upon the host system
hardware and the kinds of applications you're running.

Cheers,

Wez  <at>  RealVNC Ltd
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Phil Smith III | 1 Mar 2007 14:21

Re: Any change in user kills session

Marc <marc <at> arctic.net> wrote:
> I just discovered that a machine to which I had set up VNC 
> access and then upgraded now kicks me out as if sharing is not 
> allowed.  Both client and server are the same version (the most 
> recent free version) of real VNC.  The server is set up as a 
> server and is set to share all as is the client.  What am I missing?

Is this XP with Fast User Switching enabled?  If so, and the user you're talking about isn't on session 0 (or is
it session 1?), then this behavior makes sense.

...phsiii
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Marc | 1 Mar 2007 17:13

Re: Any change in user kills session

I downloaded the free version current about 4 months ago,  which 
I think is still the current version.  VNC worked perfectly on 
the target machine under the previous version (though that 
version had the security issue).  There is only one user logged 
in (though user switching is enabled......)

Phil Smith III wrote:
> Marc <marc <at> arctic.net> wrote:
>> I just discovered that a machine to which I had set up VNC 
>> access and then upgraded now kicks me out as if sharing is not 
>> allowed.  Both client and server are the same version (the most 
>> recent free version) of real VNC.  The server is set up as a 
>> server and is set to share all as is the client.  What am I missing?
> 
> Is this XP with Fast User Switching enabled?  If so, and the user you're talking about isn't on session 0 (or
is it session 1?), then this behavior makes sense.
> 
> ...phsiii
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Robert D. | 1 Mar 2007 17:41
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Help Connecting

I have tight-vnc running on my mom's WinME [DSL] computer 40 miles away.
I have tried various vnc-viewers running here on my Mac. I have
port-forwarding enabled. I am thru DSL Modem to Airport-Extreme Wireless

(vine-viewer / Vnc-Viewer by kedoin / SSVNC /VNC Viewer by Senecal )
I can run Vine-Server locally and get the other "Viewers" to connect to it.

Yet with my mom's I never get my end to actually send the password so it
seems.

Here's a packet capture...sorry about wrapping ...

No.      Source                Destination           Protocol Info
      2  192.168.254.1         Moms.IP.xxx.xx        TCP      49466 >
5900 [SYN] Seq=0 Len=0 MSS=1460 WS=0 TSV=1826494509 TSER=0

      3  Moms.IP.xxx.xx        192.168.254.1         TCP      5900 >
49466 [SYN, ACK] Seq=0 Ack=1 Win=11680 Len=0 MSS=1452 WS=0

      4  192.168.254.1         Moms.IP.xxx.xx        TCP      49466 >
5900 [ACK] Seq=1 Ack=1 Win=65535 Len=0

      5  Moms.IP.xxx.xx        192.168.254.1         VNC      Server
protocol version: 003.003

      6  192.168.254.1         Moms.IP.xxx.xx        TCP      49466 >
5900 [ACK] Seq=1 Ack=13 Win=65535 Len=0

      7  192.168.254.1         Moms.IP.xxx.xx        VNC      Client
protocol version: 003.003
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James Weatherall | 1 Mar 2007 18:15
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RE: vncviewer toggle full screen option command and -xrm option

Magesh,

As I said in my last mail, there is no such option to vncviewer as "-xrm".
What is it that you are actually trying to do?

Thanks,

Wez  <at>  RealVNC Ltd

> -----Original Message-----
> From: Magesh mannar [mailto:mageshmannar <at> yahoo.com] 
> Sent: 01 March 2007 15:18
> To: James Weatherall
> Subject: RE: vncviewer toggle full screen option command and 
> -xrm option
> 
> Dear James 
> 
> Many thanks for your reply. Can you please let me know
> how I should pass the -xrm option (may be with a small
> example). Is there any specific version of vncviewer
> needed for passing this option. I downloaded the
> latest free vncviewer from the realvnc homepage. 
> 
> Regards
> Magesh
> 
> 
> --- James Weatherall <jnw <at> realvnc.com> wrote:
>
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Steve Waltner | 1 Mar 2007 18:53

VNC Stopped Working After Installing Solaris 9 Recommended Patches

I'm running the free distribution of RealVNC 4.1.2. I installed the  
Solaris 9 Recommended patch bundle I downloaded on Feb 21, 2007 onto  
my Solaris 9 systems last night. This was primarily done to get the  
updates for the DST changes. Now, we're having trouble using VNC.  
Here's the arguments to my Xvnc process...

ra:~> /usr/ucb/ps auxwwwwww | grep Xvnc | grep swaltner
swaltner 22928  0.1  0.1 8152 6784 pts/27   S 11:24:45  0:00 Xvnc :14  
-desktop ra:14 (swaltner) -httpd /soft/cfr/vnc/4.1.2/java -auth /home/ 
swaltner/.Xauthority -geometry 1024x850 -depth 16 -rfbwait 30000 - 
rfbauth /home/swaltner/.vnc/passwd -rfbport 5914 -pn -IdleTimeout=0 - 
fp /usr/openwin/lib/X11/fonts/misc/,/usr/openwin/lib/X11/fonts/75dpi/
swaltner   148  0.0  0.0 1048  840 pts/27   S 11:40:04  0:00 grep Xvnc
ra:~>

When I try to send X11 graphics to that Xvnc process, I get BadAtom  
errors.

ra:~> xterm -display ra:14
Warning: Actions not found: string, scroll-back, scroll-forw
xterm:  unable to open font "8x10", trying "fixed"....
X Error of failed request:  BadAtom (invalid Atom parameter)
   Major opcode of failed request:  20 (X_GetProperty)
   Atom id in failed request:  0x0
   Serial number of failed request:  90
   Current serial number in output stream:  90
ra:~>

Out of the 157 patches in the patch bundle, each system had anywhere  
from 85-125 patches that were installed/updated, several of these
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James Weatherall | 1 Mar 2007 19:27
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RE: Help Connecting

Robert,

Firstly, I'd strongly recommend using a version of VNC with in-built session
security such as VNC Personal or Enterprise Edition, or running VNC through
a secure tunnelling protocol between the two systems.

At a guess, I'd say its most likely that you have tried to connect to the
server computer too many times, and so your viewer IP address has been
"blacklisted" for a short while, in defense against potential brute-force
attacks.  If you upgrade the server computer to a standard VNC 4 series
server then you can set it up easily to log information on connections,
including reasons for them being closed.

Cheers,

Wez  <at>  RealVNC Ltd

> -----Original Message-----
> From: vnc-list-admin <at> realvnc.com 
> [mailto:vnc-list-admin <at> realvnc.com] On Behalf Of Robert D.
> Sent: 01 March 2007 16:42
> To: VNC-List
> Subject: Help Connecting
> 
> I have tight-vnc running on my mom's WinME [DSL] computer 40 
> miles away.
> I have tried various vnc-viewers running here on my Mac. I have
> port-forwarding enabled. I am thru DSL Modem to 
> Airport-Extreme Wireless
>
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Robert D. | 1 Mar 2007 20:26
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Re: Help Connecting

James Weatherall said the following:

> Firstly, I'd strongly recommend using a version of VNC with in-built session
> security such as VNC Personal 

thanks .. I just downloaded 'personal' and emailed it to my mom's place
.. '''hopefully''' I can get her to, uh, be guided thru the install and
I can test it without driving there ... then buy the copy which would be
a tank of gas just to go there are make the weekly corrections to things
she changes.

but, wrt to your idea my IP is blacklisted in the tightvnc version
running there ... I can shut off my DSL modem and log back on getting a
new IP address and then would you think it would work?

I mean, judging from the packets, I am seeing that tightvnc is waiting
for  my-end Viewer (any of them) to send a password. And they actually
DO when I run a server on my local and connect with a 'Viewer' from this
computer ... so ..... I assumed I had some other problem (no firewall)

I have never used VNC and am totally clueless ...
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Gmane