[linux-help] Re: Ethernet problem

[Ryan Claycamp <claycamp@xxxxxxxxxxxxxxxxxxxx>]

I think I have the problem solved and thank you to everyone for their 
help.  I am not entirely sure what happened, but I think it is connected to 
my trying to get diald working on the server mail.  None of the suggestions 
solved the problem, but steered me in the right direction.  Since nothing 
was working to solve the problem, I grepped the etc directory for any 
occurrence of cad1's IP address.  It was in hosts (expected) and my diald 
conf file.  While trying diald I had used cad1's address for the local 
address for some reason.  I couldn't get diald to work, so I killed the 
process and left it for another day.
Somehow diald must have fouled the network tables.  I tried the suggestions 
of route output, but everything looked the same from machine to 
machine.  Tcpdump showed that pinging 192.168.168.1 from mail did not leave 
the machine, but stayed internal.  I ran `ifconfig eth0 down` on mail and 
could still ping 192.168.168.2 (mail's address) and 192.168.168.1.  This 
led me to believe that diald had fouled the tables even though it was no 
longer running.  Since I am not entirely weaned from Windows, I gave it the 
ol' Microsoft try and rebooted.  Problem solved.  Mail really sees cad1, 
cad1 sees mail, and cad1 isn't dropping connections, although it is too 
early to really know about the last one.
I will tackle diald in the future, but for now the network seems to be 
running smoothly again.  The first question from tech support is always 
what did you change.  I knew nothing had changed on cad1, but I had been 
messing with diald on mail.  It didn't occur to me to link the two.  Hail 
to grep and text based configuration files.  Thanks again to all who 
offered suggestions.
Ryan
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