On 25 May 2005 05:54:13 -0700,
(E-Mail Removed) wrote:
>hello,
> 1)If an organization has got real IP address then does that IP
>address is
>assigned to Computer Host or Hw Router?
It's assigned to the device that connects to the internet. That
device can be a hardware router, or a computer.
> 2)If that organiztion want to connect 5 LANs to that Real IP address
>Then what are possible ways to that?
Do you mean 5 hosts?
Network address translation (NAT). The device that connects to the
internet has a public IP address, but it can also have a second,
private IP address on another interface that connects to a LAN. This
device translates the private IP addresses from the LAN to the public
IP address. It becomes the interface, the gateway, the router, the
firewall.
> 3)Also Does that organization needs Hardware Router or Linux made as
>Router is working?
Either. Hardware routers are cheap these days.
> 4) then where to install FTP server,Web server MAIL server that can
>be access from Outside world? Can they be installed in any Internal
>host behind Router?
Yes, any host. If the router is a linux box, then they can be
installed there. For security, it's common to have a second
router/firewall. Most of the PCs sit behind the second firewall.
Server PCs sit between the two, in there own private network.
> Then how can Router map to that internal FTP server host as
>outside world only knows that real IP address?
Port forwarding. A computer from the internet will try to connect to
port 21 (ftp) of the public IP address. The router on the public IP
address will forward it on to the desired internal address.
Dan
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