[ale] Network Problem

[Bradley_Leonard at tivoli.com]

I fixed the problem late last night.  Thanks to everybody who sent me some
help.

The problem was a result of the autoprobe for pcmcia setting the wrong
ethernet address for my card.  The first 4 numbers of the ethernet address
were wrong.  It was enough to pass visual inspections and let icmp packets
through.

Brad




Bradley_Leonard at dev.tivoli.com on 06/02/98 12:52:44 PM

To:   ale at cc.gatech.edu
cc:    (bcc: Bradley Leonard/Tivoli Systems)
Subject:  [ale] Network Problem





Hi,

I've got a strange problem that I've never seen before and any help that I
could get would be greatly appreciated.

The setup:

Redhat 5.0 running on a pentium
Redhat 5.0 running on a 486 with a DNS server
Solaris 2.6 running on sparc 5

I can ping, telnet, ftp, nslookup, www between these three machines with no
problems.

The problem:

I installed Redhat 5.0 in an IBM Thinkpad 760XL.  I have a 3com 3c589d
PCMCIA card.  The card works under Win95.  After booting up Linux, the card
registers fine.  I can ping all three machines from the laptop.  I can
nslookup from the laptop, connect to the DNS server and query all I want.
I can ping from all three machines to the laptop with no problem.  This
leads me to believe that the network is setup correctly.

As soon as I try to telnet, ftp or nfs from the laptop to any of the three
machines, it hangs.  I know it resolves the name correctly, because I can
see it the IP address it tries to connect to.  Eventually the telnet will
time out.  On either the 486 or pentium, I get the following message in
/var/log/secure:

May 29 23:25:37 cimmeria in.telnetd[715]: warning: can't get client
address:  Connection timed out
May 29 23:25:37 cimmeria in.telnetd[715]: refused connect from unknown.

I get no such message on the sparc.

Does anybody have any suggestions?

Brad