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Old 02-27-2002, 10:50 AM   #1
LQ Newbie
Registered: Feb 2002
Posts: 2

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Very Strange Problem

I have some IBM NetVista 2800 Thin Clients, and a Red Hat 7.2 box. The problem is any IBM NetVista box can't ping Red hat box and Red Hat box can't ping NetVista either, but a Windows mahcine can ping any of them!

I used to use 3c905b TX NIC on the linux box, some body suggested to replace it. I replaced the 3c905B TX with a Intel NIC, but it didn't solve the problem.

We have a firewall box which is also running Linux on it, it has the same problem with IBM NetVista box.

I guess that IBM NetVista and Linux don't like eath other because Linux has some security feature on by default, but I am not sure. Does anybody have any ideas on this?

Thanks in advance

Old 03-05-2002, 05:54 PM   #2
Registered: Oct 2001
Location: Columbus, Ohio
Distribution: all.. but mainly SuSe--- looks like it changing to Red Hat
Posts: 119

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Im not real sure... though you could run ethereal, which is a packet sniffer.. and then try to see whats going on...

Old 03-05-2002, 08:17 PM   #3
Registered: Oct 2001
Distribution: red hat 7
Posts: 58

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have u checked the gateway's set for the nic's on these machines?

r there any firewall issues which are blocking ICMP (ping) replies on either of these machines? (check the ruleset)
Old 03-06-2002, 09:21 AM   #4
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Registered: Feb 2002
Posts: 2

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After running tcpdump, I found that NetVista doesn't reply to arp and icmp. But I have not figured out how Windows machine gets reply....


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