Re: [Hampshire] Network numpty - thank you

Thanks for that, Jamie. It was very helpful. :-)

Lisi

On Monday 20 Nov 2006 08:31, Jamie Webb wrote:
> On Mon, Nov 20, 2006 at 08:00:44AM +0000, hantslug@??? wrote:
> > So the second IP can be entered in a ppp file and that provides the
> > second interface? And one needs two cables (one going to the
> > internet/adsl and one going to the private network?
>
> Something like that, yes.
>
> > Presumably, if instead of a modem, one has a single port "router", with
> > an RJ45 connection (which most people advocate with Linux rather than an
> > adsl modem), then one needs two interfaces - i.e. 2 cards - and two
> > separate cat5 cables going to the 2 separate NICs/interfaces?
>
> Yes.
>
> > The "aboutdebian website says
> >
> > <quote>Adding A Second Network Card
> >
> > Setting up a proxy or firewall system requires that the system have two
> > NICs so you would have to add a second network card to your existing
> > networked Debian system. If you want to use a Linux system as a router
> > you would have a system with multiple NICs, one for each of the subnets
> > you wish to interconnect. </quote>
> >
> > Is this in fact wrong?
>
> It's not exactly wrong. You need two NICs (in practice). It's just
> that one of those might be a PCI/USB ADSL modem rather than a regular
> ethernet card.
>
> > (Sorry - I was one of those involved in the debate and I was saying that
> > I could not understand how one network card could handle 2 IPs and 2
> > interfaces. I'm afraid I still don't. :-( Perhaps someone could show me
> > at the next BaB.)
>
> It's possible to alias an interface so it responds to more than one
> IP, but it's really not a good idea in this situation. Not worth
> worrying about unless you want to get into virtualization or virtual
> hosting.
>
> -- Jamie Webb