[Techtalk] network query

[Finne Boonen]

correct me if I'm wrong pls

On Sun, 11 Jan 2004, Patricia Fraser wrote:

> Hi all,
> 
> I am in the process of connecting to ADSL via a D-Link 300+ modem, which 
> has a built-in pppoe client. The advice from the ISP is to use DHCP to 
> get the IP address. This works fine on the machine I've got connected 
> now.
> 
> My problem is, I now want to set up a home network, using the connected 
> PC as the gateway/firewall. But my head isn't around the DHCP vs. 
> standard routing thing; if the gateway machine gets a new IP address 
> from the ISP periodically, then how do I manage this? Will all the 
> machines in the network have to use DHCP, or can I mix the two methods?

your gateway will have 2 ip's, 1 for your home network, and one for your
ISP, your home network machines only need to know the ip for your home
network.

basically:
                                      ____________(ip4)___machine
                                     |
ISP---------(ip1)---Gateway--(ip2)----------------(ip3)---machine

machine 3 and machine 4 communicate with the gateway by means of ip2, the
gateway will take care of sending them out correctly.

You can mix dhcp and fixed ip, just make sure to give the dhcp ip's a
different range then the fixed ip's in order to prevent  2 machines using
the same ip. Another solution might be to give every machine a dhcp ip and
attach specific ip's to different mac adressess.

Finne


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