Help > Self Help > Broadband ADSL > Broadband Networking Guide - Internet Connection Sharing
Broadband Networking Guide - Internet Connection Sharing
Setting up Internet Connection Sharing for your No-NAT network
With reference to Figure
2, we saw how one solution to how to connect your publicly available
IP-address (server) to the rest of your network would be to install a
second network interface card (NIC) to your machine and share the Internet
connection. The quickest way to do this is to use Microsoft's Internet
Connection Sharing (ICS) that comes as standard with Windows operating
systems Win 98SE and above.
The following screenshots show the settings
you might use based on our example subnet of 212.159.98.64 (255.255.255.252).
Don't forget to use the public IP address(es) that you have been assigned,
not our examples - obviously you are free to use whatever internal
IP range you wish (10.0.0.0, 192.168.0.0. etc)
From the Control Panel we'll need to select
to configure the network settings for our server.
Control Panel > Network and DialUp (W2K shown)
In the network settings area of the Control Panel
you will see an icon for each of your installed Network cards. You
may need to enable one of these if it appears greyed out (if this
is the case simply right-click and enable).
You need to configure the network card that is connected to your router first. Depending on your router
type you may need either a standard Ethernet or a crossover cable
to connect your ADSL router directly to a network card (you should
ask your hardware vendor if in any doubt).
Network connection settings for your two NIC's
Network properties for the router side NIC
address block, in our example 212.159.98.66 with the appropriate subnet
mask. The default gateway for this connection should be that of the
router, 212.159.98.65. We have specified the DNS
The first network card's TCP settings
Click on the 'Sharing' tab for this connection (Win98SE
and above) and you'll be able to switch on Internet Connection Sharing
(ICS) for this connection.
Turn on ICS
Now for the configuration of the TCP for the second
network card: here we're going to specify a new IP range to use on
our internal network (our example here being 192.168.0.1). Our default
gateway here is going to be of course the IP address of the first
network card (212.159.98.66).
Setting up your second network card
Connect a further
machine via a crossover cable or a whole network of internal machines
via a hub or switch. These machines must be on the same
internal network as you specified on the second of your network
cards.
Now you're up and running
you might want to run DHCP from your server to obtain your internal
IPs.
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