[CoLoCo] Remote Access

[Michael Robbert]

Jim,
The problem is NAT, Network Adress Translation. Most home routers have  
to do this because you only get one public IP address. Your router  
then gives all of your local computers a private IP that can not be  
routed on the Internet. NAT does some fancy things with tcp/udp ports  
and tracks your connection. Essentially everything going out your  
router looks like it is coming directly from your router not from your  
PC. Then the return traffic needs to be translated by the router using  
its tracking tables. This means that connections can not be made to  
your internal PC from the Internet without some trickery like port  
forwarding.
You'll have to look up any further info. My thumbs are getting tired.

Mike Robbery

Sent from my iPhone

On May 9, 2008, at 10:28, "Jim Hutchinson" <jim at ubuntu-rocks.org> wrote:

>
>
> On Fri, May 9, 2008 at 7:22 AM, Kevin Fries <kfries at cctus.com> wrote:
> Both firewalls are Nat firewalls.  So machine A might have an  
> address of
> 192.168.1.100 and machine B might have an address of 192.168.0.2.  But
> they are not on the same segment and using addresses that are not able
> to be routed over the Internet.  If either had a public, static IP,  
> VNC
> alone could be a solution.  But, without one side or the other  
> having a
> public IP, neither side can initiate the communication to the other.
>
> Not being an expert in networking I may be missing something, but  
> I'm unclear how you can have computers that don't have a public IP  
> (assuming of course that they have internet access). They must be  
> connected to a router (to get the lan IP) which is connected to a  
> modem which connects to the internet and has an IP address. Are  
> these boxes on a private lan with no external access? Or do they  
> have a dynamic IP and that is the problem? If dynamic, why not try  
> dyndsn? It works for me.
>
> I'm sure you know what you are doing but something is missing in  
> this picture - at least as I see it.
>
> ----
> Jim (Ubuntu geek extraordinaire)
> ----
> Please avoid sending me Word or PowerPoint attachments.
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