gmcc "at" comcast.net
Sun Oct 31 13:47:01 2004
At 12:00 PM 10/31/04 +0000, you wrote:
>From: BPS <bpsa2 "at" yahoo.com>
>OK, I feel like I'm muddling my way through
>configuring the router, and getting around the Win XP
>SP2 firewall, but now do I also have to go through
>gyrations to work with dynamc IPs? Don't most
>computers with a router have dynamic IPs?
>I just read a post about myserver.com. So is this the
>next step I need to take?
>I'm really confused...... In the Viewer documentation
>that I printed off of the realvnc.com site, on the
>first page of instructions, it shows a picture of the
>VNC Viewer Connection Details, and has "192.168.0.1"
>typed in as the Server. I don't get it..... won't
>that IP address connect to a gazillion computers?
>'Cause isn't that pretty much a standard IP address
>that most everybody has?
>Thanks for any guidance!
I haven't followed the whole thread and so I won't try to answer all of it.
But I think the part of the dynamic IP puzzle that you are missing is this:
If you are using a computer connected to a router, then you are actually
dealing with _two_ IP addresses. Your computer probably has a 192.168.x.x
address that is probably assigned to it by your router. The magic about
that address is that it is in what is known as "private" address space, and
does not route on the outside world Internet. So yes, a lot of boxes have
that same address, but it doesn't matter because that address is only
useable on your (and theirs of course) private network...which includes
anything attached to the inside connection of the router.
Your router though probably also has a dynamic IP, but it is assigned to
the router by your ISP. That address can and _does_ route on the outside
world Internet. And the fact that it is dynamic means it can change
whenever the ISP wishes to change it. For some ISP's this is very
infrequent, but you have no control over if and when it does.
You _can_ have control of your inside private address though. If you
router is assigning you an address (for example) of 192.168.0.1 (and you
can check this), you can make that address static on your local computer.
But if you have one computer connected to one router, is is very likely the
same all the time anyway.
So... your computer connects to the router via your private IP address, and
your router _routes_ (hence the name) that connection to it's real world
Internet address outside. When a request from the outside is answered, the
router then routes that answer (a web page or whatever) from that real
world address back to your private address.
If you're trying to set up port forwarding for VNC, you have to do this
because normally your router will not send anything to your private
addressed computer that wasn't previously requested _by_ that computer.
That is the reason the router provides a layer of security to protect you
from intruders being able to just connect to your computer without your
Does this help at all (it got a little long I'm afraid)?