Dual NIC cards - Need help

[Bret Stern]

> -----Original Message-----
> From: Rick Stevens [mailto:rstevens at vitalstream.com] 
> Sent: Saturday, February 25, 2006 6:28 PM
> To: Getting started with Red Hat Linux; 
> bret_stern at machinemanagement.com
> Subject: Re: Dual NIC cards - Need help
> 
> On Sat, 2006-02-25 at 16:47 -0800, Bret Stern wrote:
> > I have installed two NIC cards on a Dell Poweredge 1300.
> > 
> > I'm routing port 80 through my firewall to my web server.
> > These requests arrive via eth0.
> > 
> > Eth1 is used to access a backend database via perl cgi
> > scripts called on the host Apache httpd server.
> > 
> > One card is on subnet 192.168.0.xx
> > One card is on subnet 192.168.5.xx
> > 
> > I can ping both networks. However, I cannot see any of
> > the Samba and Windows 2000 servers on my network.
> 
> Can you ping the various machines in question?  Can you do a 
> traceroute
> and verify which interface they're listening on?
> 
> > My plan is to have perl scripts access the backend
> > database.
> > 
> > Any ideas on why I cannot see my internal network using
> > the gnome Network explorer? Or is it a good thing not
> > being able to see the internal network?
> 
> This is most commonly a route issue, but it could be a firewall or
> iptables issue.  Could you send us the IP map of what you have and
> possibly a better description of what you have set up (what's plugged
> into each switch, etc.)
> 
> ----------------------------------------------------------------------
> - Rick Stevens, Senior Systems Engineer     rstevens at vitalstream.com -
> - VitalStream, Inc.                       http://www.vitalstream.com -
> -                                                                    -
> -    Admitting you have a problem is the first step toward getting   -
> -    medicated for it.      -- Jim Evarts (http://www.TopFive.com)   -
> ----------------------------------------------------------------------
> 
Mostly better now!

One of my network cards was not starting on boot, even though it
was setup to do so. They were both Intel Pro 100 cards.
I replaced one of the nic cards. Now both network cards
come up on boot. Also, I am now able to see the internal network
servers, AND the internet.

My last configuration is to remove the gateway on the internal lan
card, so there is only one gateway to the internet.

I haven't played, or read much about the iptables setup, but may
be asking shortly.


This is the best place to get complete answers on Red Hat!

Cheers,

Bret