On Fri, 25 Jan 2002, Mark Plowman wrote:
> > From: Jeff Newmiller <[EMAIL PROTECTED]>
> > Date: Fri, 25 Jan 2002 02:39:41 -0800 (PST)
> >
> > On Thu, 24 Jan 2002, WS Wong wrote:
> >
> > > I am a newbie to Linux firewall. I downloaded the Dachstein image and
> > > installed in a P100 PC with 64MB RAM and two Linksys Ethernet cards.
> > > Every thing works fine connecting to a DSL modem on one end and my
> > > home PC on the other end of the firewall box.
> > >
> > > I have two spare 3Com 3C509B-TPO Ethernet ISA cards. I want to add
> > > the 3Com cards to the Linux firewall and have the one Linksys card and
> > > two 3Com cards working as a Hub. This way I can have a local three
> > > computers network that can talk to each other and share one ISP IP
> > > address for Internet access.
> > >
> > > Is it feasible to add the hub function into a floppy disk firewall
> > > box? Did anyone try this configuration before? What do I have to
> > > change and add to the network configuration module to add the Hub
> > > functions?
> >
> > Theoretically possible, if you enable bridging, but not really worth the
> > trouble it will take.
> >
> > Hubs and switches are too economical in their per-port cost these days to
> > consider using a computer instead. Really.
>
> You can use your Firewall as a Hub or as a *Router*.
>
> This is perhaps not so much work.
>
> You must specify the ethernet cards in the config (much as the
> existing *internal* interfaces), they must each have there own network
> (192.168.0.*, 192.168.1.*, 192.168.2.* etc) and there is a little bit
> of magic that must be done somewhere (and I can't remeber where -
> anyone else?) to allow the networks to talk to each other (as the
> default is seperate networks).
The drawback to this is the loss of broadcast communication support
between your hosts, because they are on different networks. This feature
is most commonly used in peer-to-peer networking (Appletalk,
CIFS=Windows). Thus, _routing_ is not a clean substitute for switching or
hub-connection.
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