The way you describe it should work just fine. I do the same thing.
 From a remote machine you should try "telnet xxx.xxx.xxx.97 5900" and 
see if it connects at all.
If not, the odds point to some issue with the firewall rule...

Kevin Duffy wrote:

>James: 
>
>Thanks for you reply.
>
>I double checked as follows:
>  Yes the server machine is an XP box,  but it has an exception for VNC Server 
> and viewer.
>  And there is a machine on the LAN that can connect to the VNC server, no 
> problem.
>
>  Behind this firewall there is also a Linux machine with SSH running. I can 
> connect to the Linux   box via SSH.  This proves that I have the correct 
> external IP address and that I know how to forward ports on the forewall.  
>
>  I double checked that the address I am forwarding the port to is correct
>
>
>KD
>
>
>-----Original Message-----
>From: James Weatherall [mailto:[EMAIL PROTECTED]
>Sent: Wednesday, January 26, 2005 5:35 AM
>To: Kevin Duffy; [email protected]
>Subject: RE: newbie question
>
>
>Kevin,
>
>If the Windows machine is running Windows XP SP2, you'll need to disable its
>firewall, or make VNC Server an Exception to it (VNC Enterprise Edition
>4.1.3 will do this for you, if you wish). 
>
>Are you sure that you have the correct address for your LAN's firewall?  Is
>it pingable?  Error 10060 means that there was absolutely no response at all
>from the target machine, which is consistent with a firewall being in place,
>with the computer not existing, or with the address being wrong (and
>pointing to a machine that doesn't exist...)
>
>Cheers,
>
>Wez @ RealVNC Ltd.
>
>
>  
>
>>-----Original Message-----
>>From: [EMAIL PROTECTED] 
>>[mailto:[EMAIL PROTECTED] On Behalf Of Kevin Duffy
>>Sent: 26 January 2005 03:00
>>To: [email protected]
>>Subject: newbie question
>>
>>Hello:
>>
>>I am attempting the connect to a Windows machine running the 
>>VNC Enterprise
>>server.
>>To do this I did the following:
>>    On the firewall of the LAN for the VNC Enterprise server 
>>forward port 5900
>>to the server machine.
>>    On the remote machine download VNC Enterprise Viewer.
>>    Run the viewer and enter the IP address of the firewall (ie
>>xxx.xxx.xxx.97:0)  colon zero because we are connecting to a 
>>Windows machine.
>>
>>This should work.  True?
>>
>>I get Attempting to connect to host for several seconds and then
>>Error unable to connect to host:Connection timed out (10060)
>>
>>Your assistance to greatly appreciated.
>>
>>Kevin Duffy
>>_______________________________________________
>>VNC-List mailing list
>>[email protected]
>>To remove yourself from the list visit:
>>http://www.realvnc.com/mailman/listinfo/vnc-list
>>    
>>
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