[K12OSN] VNC into server from outside

[Petre Scheie]

Assuming you are using VNC to allow you to connect to gdm--that is, when you connect via 
VNC, you get the same login screen as the clients--login as root and run Fl_teachertool 
to see what the kids are doing.  Or run 'ps -ef' or 'ps -aux' in a terminal window to 
see all processes for all students, for a lower-level view.

BTW, if you're using VNC to connect to your server from the outside world, have a look 
at Freenx.  You can install the server part with just 'yum install freenx'.  Be sure to 
get the client piece from the www.nomachine.com website, as the one that comes in the 
freenx package appears to be broken.  Follow the directions, esp. the bit about 
importing the server's key, at  http://fedoranews.org/contributors/rick_stout/freenx/. 
Why do all this?  Because the performance of NX is substantially better than VNC.  VNC 
is better than driving into the office to fix a problem, but you wouldn't want to use it 
very long.  NX on the other hand is nearly real time and works pretty well even over 
dial-up. It all works over SSH/port 22.  It's worth the effort.

Petre

mark at ehle.homelinux.org wrote:
> Thanks for the information - Silly me - I had to unblock those ports on the
> server firewall.
> 
> Now that I can VNC into the server, how do I view what my students are doing?\
> 
> Thanks again!
> 
> Mark
> 
> Quoting Dan Dwelley <ddwelley at msad54.org>:
> 
>> VNC uses ports 6000, 590x, and 580x. Check your firewall to determine
>> these ranges are not blocked.
>>
>> Dan
>>
>> -----Original Message-----
>> From: k12osn-bounces at redhat.com [mailto:k12osn-bounces at redhat.com] On
>> Behalf Of Bob McCaa
>> Sent: Tuesday, February 21, 2006 3:51 PM
>> To: Support list for opensource software in schools.
>> Subject: Re: [K12OSN] VNC into server from outside
>>
>> Do you have a firewall on your "outside" interface?  Could it be
>> blocking VNC access?
>>
>>
>> On Tue, 2006-02-14 at 11:11 -0500, mark at ehle.homelinux.org wrote:
>>> Folks -
>>>
>>> I installed a fresh copy of K12LTSP-4.4.1 on my server, ran vncpasswd,
>>> fired up vncserver, and I can't vnc into the server from the outside.
>> What am I missing?
>>> Thanks!
>>>
>>> Mark
>>>
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> 
> 
> 
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