Networking help

[pll at lanminds.com]

Hi all,

I have a very bizarre problem going on here. I have a system on a 
different subnet.  From my desktop, I ping the system and get no 
response.  

I ssh to another system on the same subnet, and can ping that system.
Additionally, I can ssh to that system from the system on the same 
subnet.  

The route tables look fine, the interface is up, and can ping stuff 
off it's local subnet.

If I run 'tcpdump -i eth1 icmp' on this system, then ping it from my 
desktop, I see the 'icmp echo request' coming in, but no
'icmp echo reply' going out.

There is no ipchains/tables running, no tcpwrappers or anything that 
should be blocking icmp, or any other network activity.

Eventually, if I leave the ping on my desktop running (i.e. don't 
Ctrl-C it) the remote system will answer.

Pertinent systems specs:

  Monolithic kernel (no modules):
    Linux www 2.4.19 #1 Thu Aug 15 18:08:58 EDT 2002 i686 Pentium III (Coppermine)
    GenuineIntel GNU/Linux

  3 NICs (only using eth0/1 currently):
  eth2 01:05.0 Ethernet controller: Intel Corp. 82557/8/9 [Ethernet Pro 100] (rev 08)
  eth1 02:04.0 Ethernet controller: Intel Corp. 82557/8/9 [Ethernet Pro 100] (rev 0d)
  eth0 02:05.0 Ethernet controller: Intel Corp. 82557/8/9 [Ethernet Pro 100] (rev 0d)

  Debian (woody)

Anyone have any insights on this one?  Interestingly, I have several 
systems which are all identical (Hardware and OS installation).  Some 
have this problem, others don't.

Thanks,
-- 

Seeya,
Paul
--
	It may look like I'm just sitting here doing nothing,
   but I'm really actively waiting for all my problems to go away.

	 If you're not having fun, you're not doing it right!