Re: Networking

[Al Hudson <nospam [at] york.ac.uk>]

On Sat, 6 Nov 1999, Will Newton wrote:

> Here's my situation, I was wondering if anyone could put forward a simple
> solution:
> I would like to be able to get pppd running on demand from my box when
> someone tries to access the net. All the machines have 192.168.* IPs, and
> pppd is on dynamic IP.
> What's the best way to get my machine to route packets between the modem
> and the private network IPs?

First, you have to setup your internal network correctly. You'll probably
want to setup your linux box as a DNS server for naming purposes. You'll
want it also to be a router probably. There are how-tos for both these.
Essentially, you fool your windows machines into believing that the linux
box is connected to the internet.

You'll then want to setup IP masquerading, so that the machines on the
internal network can communicate with the outside world. There's a lengthy
howto on this subject also. Dial on demand is fairly easy to implement,
and then that's it.

There is another, more cunning method, detailed in the linux-modem-sharing
mini-howto; essentially, rather than fooling the win machines into
thinking that the linux box is an internet server, you fool them into
thinking the linux box is a modem. This can be easier or harder, depending
on your setup ;))

Cheers,

Alex.

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