Redhat Enterprise 4 Remote Desktop (VNC) Server Port

[Ed Greshko]

Don Lindbergh wrote:
>>> Ed wrote:
>>
>> Well...one way to do this is to edit the /etc/init.d/vncserver file.
>>
>> In the "start" subroutine exit the line:
>>
>> "su ${USER} -c \"cd ~${USER} && [ -f .vnc/passwd ] && vncserver 
>> :${display%%:*}\""
>>
>> to be:
>>
>> "su ${USER} -c \"cd ~${USER} && [ -f .vnc/passwd ] && vncserver 
>> -httpport 6900 :${display%%:*}\""
>>
>> Seems as if there should be a way to specify this in a config 
>> file...and yes I assumed the Xvnc man page would have had it.  :-)
> 
> 
> Hmmm, just tried editing that file and specifying a different port, 
> restarted, and the vnc server continues to run on tcp port 5900 (I had 
> previously thought it was 5800).

There are 2 ports for the vncserver....

One is the httpport that I thought you were talking about.  That is the 
5800 range and controlled by the -httpport parameter.

The other is the "remote frame buffer" port which is the 5900 range and 
controlled by the -rfbport parameter.

See "man Xvnc" for...

-rfbport port
     Specifies  the  TCP  port  on which Xvnc listens for connections
     from viewers (the protocol used in VNC is called RFB  -  "remote
     framebuffer").  The default is 5900 plus the display number.

and

-httpPort port
     Specifies the port on which the mini-HTTP server runs.   Default
     is 5800 plus the display number.


> 
> If I stop the server, I do an nmap afterwards and it's still 
> running/listening and I can connect with a client.
> 
> /etc/init.d/vncserver stop
> 
> Shutting down VNC server:                                  [  OK  ]
> 
> [root at localhost don]# nmap -sT -O localhost
> 
> Starting nmap 3.70 ( http://www.insecure.org/nmap/ ) at 2005-03-28 21:29 
> EST
> Interesting ports on localhost.localdomain (127.0.0.1):
> (The 1655 ports scanned but not shown below are in state: closed)
> PORT     STATE SERVICE
> 22/tcp   open  ssh
> 25/tcp   open  smtp
> 111/tcp  open  rpcbind
> 631/tcp  open  ipp
> 5900/tcp open  vnc
> 
> --Don

-- 
"A common mistake that people make when trying to design something
completely foolproof was to underestimate the ingenuity of complete
fools."

--Ford Prefect in "Mostly Harmless".