IPCOP Linux not passing traffic through. Suggestions?

I set IPCOP up (was WAY easy...perhaps...TOO easy....) and the
LAN/Green side works fine. Everybody sees it, it sees everybody, all is
well.
But evidently the ISP/Red side isn't set up properly perhaps....

While the CAT-5 from the ISP's router/NAT is plugged into the switch
all the PC's are plugged into, everything is great. Plug that into the
NIC on the IPCOP, and not only will not traffic go through, but the NIC
itself doesn't even get a "connected" light.
But if I plug the CAT-5 that goes to the switch into that NIC, I get
the lights at least.

Why would there not even be a "connection" light on the NIC when I plug
that CAT from the ISP's router in?

Of course when I tried putting the IPCOP between the ISP and the
switch, I took one of the PC's and changed its Default Gateway and
whatnot to point to the IPCOP. I don't think the problem is on the
Green side.

Any suggestions what I need to look for or do to get the Red side
running?
Any suggestions appreciated!
Liam

(E-Mail Removed) wrote:
> I set IPCOP up (was WAY easy...perhaps...TOO easy....) and the
> LAN/Green side works fine. Everybody sees it, it sees everybody, all is
> well.
> But evidently the ISP/Red side isn't set up properly perhaps....
>
> While the CAT-5 from the ISP's router/NAT is plugged into the switch
> all the PC's are plugged into, everything is great. Plug that into the
> NIC on the IPCOP, and not only will not traffic go through, but the NIC
> itself doesn't even get a "connected" light.
> But if I plug the CAT-5 that goes to the switch into that NIC, I get
> the lights at least.
>
> Why would there not even be a "connection" light on the NIC when I plug
> that CAT from the ISP's router in?

Wrong cable. The router is wired like a PC network port, so you use a
straight through cable to a switch, or a crossover cable to another PC.
So replace the router's existing cable with a crossover cable and you
should see the connection light.

John-Paul Stewart wrote:
> (E-Mail Removed) wrote:
> > I set IPCOP up (was WAY easy...perhaps...TOO easy....) and the
> > LAN/Green side works fine. Everybody sees it, it sees everybody,
all is
> > well.
> > But evidently the ISP/Red side isn't set up properly perhaps....
> >
> > While the CAT-5 from the ISP's router/NAT is plugged into the
switch
> > all the PC's are plugged into, everything is great. Plug that into
the
> > NIC on the IPCOP, and not only will not traffic go through, but the
NIC
> > itself doesn't even get a "connected" light.
> > But if I plug the CAT-5 that goes to the switch into that NIC, I
get
> > the lights at least.
> >
> > Why would there not even be a "connection" light on the NIC when I
plug
> > that CAT from the ISP's router in?
>
> Wrong cable. The router is wired like a PC network port, so you use
a
> straight through cable to a switch, or a crossover cable to another
PC.
> So replace the router's existing cable with a crossover cable and
you
> should see the connection light.

Ah! OK. So, I made a crossover cable:
http://www.duxcw.com/digest/Howto/ne...ble/cable5.htm
and now I have a connection light!

But I still can't get traffic to pass through.
I set the PC to use the IPCOP as the Gateway and refreshed the NIC. I
used a static IP. I turned IPCOP's DHCP on and tried dynamic, either
way, just can't get a PC to "see" the Internet.

I'm certain I'm missing something simple...but I feel like I've looked
at all the basics, and can't find it.

It's probably as simple as straight vs crossover cable, but I just
don't know enough to know even quite where to look. =)

Thanks for any suggestions on where I should focus my looking!
Liam