Hello andy...

sorry to say but you need to do more to your router before
this will work.  the Address 192.169.x.x are reserved for
local addresses (theese are not valid internet addresses
and will not be routed throught the internet)

Included you'll find my standard answer:

And the answer is that you'll need to configure your router.
yes, the 2 PC's work, behind the router, you got a private 
network (with private addresses).  So there it works,
but no one on the internet would know where to send
192.168.x.x address too, since they are not allowed on the
internet.

I you can have changes made to the router, then I would suggest
that you set up an SSH server on your pc, and have TCP port 22 
on the router redirected to your pc.  This will allow you to 
use vnc over an encrypted tunnel, which I think is required in
in your case.  But talking about this is worthless if you can't
have changes made to the router...
 



On Wed, 2003-03-05 at 04:23, andy wrote:
> Here is my problem,
> 
> I am military and trying to use the VNC program to help out with problems the
> family may not be able to handle while I am away.  My home computer has a
> shared DSL connection between my computer and my son's computer through a
> router set up.  Before I left i made sure I could talk from one computer to
> another and it seemed to work just fine.  Now that I am away, I can't connect
> to either computer. The IP address to me looks a little funny and may be
> giving the problems but it did work from computer to computer.  they are
> 192.168.0.2   and the other compuer is 192.168.0.3...usually you have sets of
> three on the numbers and the 0.2 or 0.3 may be confusing it or something.  I
> would appreceate any help anyone can offer.  I have used the viewer program to
> access other computers  already but just can't access my own.
> _______________________________________________
> VNC-List mailing list
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> 


Here we go again....
again...
again....

Okay, your situation


+------+a     b+--------+c             d+-----+
& PC1  +-------+ Router +--- Internet --+ RPC &
+------+       +--------+               +-----+

a- Your private address,
b- Router private address
c- Router internet address
d- RPC internet address


Okay, 

Question 1:
   Is there anyway I can get from a PC in
   the Internet (RPC) to PC1 without going 
   through Router?
Answer:
   NO, the machines are wired that way!
   if you want to send packets to PC1 they
   are going to have to go through Router, so 
   you are going to have to send them to router,
   so you are going to have to know Router's 
   internet address.  Alternatively you can hook 
   up PC1 to the internet in a diferent way, (one
   where he doesn't go through another computer 
   to get to the internet in other words gets 
   his own internet address).

Question 2:
   Can I get from the Internet to PC1 (Okay thru
   Router since I have too) with out doing 
   anything to Router?
Answer:
   NO.  Router has to read the packages off the 
   the internet connection, modify them, and send
   them on to PC1.  To do this Router must be able 
   to recognise which packets to route, and to 
   send them to PC1.  This has to be setup on Router.

YOUR QUESTION:
   Is there a way to get a vncviewer (running on a 
   machine in the internet called RPC) to show PC1's 
   screen.
ANSWER 0:
   Yes, there many ways to do this.
ANSWER 1:
   start a vncviewer on RPC, connect to Router. Once
   on router, start a vncviewer connect to PC1. Use 
   to your heart's content. 

   This method is often overlooked.  It's a little 
   slower than messing with tunnels, ip NATing and Co. 
   but you don't have to mess with tunnels, ip NATing
   and Co.8-) Additionally I've found that it is faster
   than one would expect.  The reason being that the 
   PC1<->Router connections is usually 10mbs or better 
   while the Router<->RPC conneciton is 128Kbs or less.
   (In English, the PC1's screen is copied via a fast 
   connection to Routers screen. From there it is 
   copied via a slower connection to RPC.  On RPC 
   as you wait for the slow copy... you can barely 
   notice that an additionaly copy was made.)  YMMV.
   (Your milage may vary)  

   advantages: no tunnels/ip natting & funky stuff 
               like that.
   disadvantages: No security. A little sluggish.

ANSWER 2:
   On RPC start a VNCViewer in "Listening mode". 
   Then on PC1 use the "Add New Cient" function 
   to connect to it. This works because Router 
   is already setup to route PC1 traffic to the
   the internet.  How do I know? Well PC1 is 
   connected to the internet, so obviously, 
   Router is setup to "Route" packes for PC1 out 
   to the internet and back! The problem here is 
   that PC1 must be the initiator.  Which is 
   okay for remote support since the user on 
   PC1 can initiate the connection, but is a
   little more dificult when nobody is around
   PC1.  Of course you could write an autoexec
   batch file and modify your bios to start your
   office pc at the bank in the middle of the 
   night, when it is dark, between the watchmans 
   rounds, But then Dective Dick Tracy (Starring 
   Brad Pitt)....  Upps, got carried away there...

   advantages:  No changes to router(did I say 
                that was impossible?)
   disadvantages: Still no security, Need insider
                help.


ANSWER 3:
   Messing with Tunnles, NATing and Co.
   (Tell Router to "Route" the necesary packets to 
   PC1, and back.)  There are many many many many 
   methods of doing this so to help you here you 
   are going to have to tell us what hardware / 
   software system Router is (ie. Linksys adsl 
   router, Checkpoint firewall, window 98, 
   Linux 2.2.12, MAC OSX, what ever) and weither 
   or not you have permision to mess with Router.


   advantages: security, compression, SPEED!
   disadvantages: Messing with Tunnles Nating 
                  and Co. 8-)



Hope this helps you (and others) to understand a little 
bit about what you are trying to deal with here...
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