eth0 /eth1 confusion

[Ben Dugdale <turtlendog rmusd net>]

Hi, thanks for reading..

I set up a firewall last week.. All was working until one of the NICs 
stopped responding.  I thought I had traced the problem to a bad NIC, 
but now with a new NIC this problem presents itself.

If both NICs are connected to the same hub (with my gateway as well) I 
am able to use ipchains normally.  When I sperate the networks things 
start to go hay-wire, and I noticed this odity...

Note: this with my ipchains set to  ACCEPT.

from ifconfig...

eth0      inet addr:192.168.77.210

eth1      inet addr:192.168.79.30

from netstat -r... note the default eth1 and gateway

Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt 
Iface

default         192.168.72.1      0.0.0.0         UG       40 0 
 0 eth1


a default ping.. note the from address indicates a ping from eth0.  No 
contact via eth0 is consistant with my physical network.

PING 192.168.72.1 (192.168.72.1) from 192.168.77.210 : 56(84) bytes of data.
From 192.168.77.210: Destination Host Unreachable


a ping off eth1 using the -I eth1 flag... ahh.. contact!

PING 192.168.72.1 (192.168.72.1) from 192.168.79.30 eth1: 56(84) bytes 
of data.
64 bytes from 192.168.72.1: icmp_seq=0 ttl=255 time=7.817 msec


Why is my eth1 listed as my default but my default pings seem to 
originate at eth0?

I've been using /etc/sysconfig/network to set my GATEWAYDEV="eth1"
I've also tried GATEWAY="192.168.72.1"

Thanks for any advice.

Ben

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