[RndTbl] using hub to connect to shaw

[Mike Pfaiffer]

Dan Martin wrote:
> This should be simple, but for some reason I can't get it working.

	Should work. I did it before.

> My present setup:
> shaw cable modem ----> linux box / iptables ----> airport extreme ----> 
> a happy group of Mac & PCs, some wired, some wireless

	Essentially your Linux box is a router.

> Problem:
> My broker supplies me with software for streaming quotes that must run 
> on XP and not be behind a firewall.
> 
> Solution (I thought):
> Use my old Allied Telesyn CentreCOM MR815T hub/repeater, and take 
> advantage of the fact that Shaw will issue 2 IPs.
> shaw cable modem ----> hub
>                            port 1 |---------> linux box / iptables ----> 
> etc, as before
>                            port 2 |---------> promiscuous XP box
> 
> If I connect either the network (my present system) or the XP box 
> directly to the cable modem, each seems to work.  If I connect either of 
> these through the hub, it no longer works.  A diode will light up 
> showing the connection of a PC to a particular port, but will not light 
> up when I plug in the ethernet cable from the cable modem.  The hub will 
> indicate activity when an attempt is made to access the internet, but no 
> activity is registered on the cable modem.

	Ah I think I see your problem. You touch on it later.

> I have used different ports on the hub, 3 different ethernet cables to 
> connect the modem to the hub, and at times I have rebooted the modem or 
> the PC attached to the hub (various permutations of these actions).
> 
> The hub has 8 ports - the first 7 are labelled with an "X" which I 
> believe means MDI-X (crossover) configuration to plug a PC into.  Port 8 
> has a switch to select MDI or MDI-X.  What should I plug the modem into? 
> (I have tried both).

	You use regular (not crossover) cables in the first seven. Port 8 can 
use either depending on the position of the switch. Your machines should 
connect to any of the first seven ports. The cable modem connects to 
port 8. The other potential problem I can see at this point might be a 
break in a cable...

				Later
				Mike



> -- 
> Dan Martin, MD
> GP Hospital Practitioner
> Computer Scientist
> ummar143 at shaw.ca <mailto:ummar143 at shaw.ca>
> (204) 831-1746
> answering machine always on
> 
> 
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