- To: slug@xxxxxxxxxxx
- Subject: RE: [SLUG] server crash - incorrect iptables config possible caus e.
- From: "Rowling, Jill" <Rowling@xxxxxxxxxx>
- Date: Thu, 3 Apr 2003 12:54:11 +1000
Unlikely to be anything you did to the software.
Most *ix-like operating systems (including Linux) rely entirely on the
hardware being in good condition.
If you have faulty hardware, you can get unpredictable problems.
The only hardware faults that people have written software around are ECC
errors, ethernet faults, disk faults and other common problems. Usually if
there is a processor fault it is very difficult to handle in software, so
instead of panicing or issuing an error message, the machine simply fails to
work properly and can hang.
Intel hardware usually runs very slowly when it gets hot; it's a hardware
feature to stop the silicon melting itself. Some AMD processors can, too
(others just cook themselves).
I had some really bizarre faults on my home system last January where it
would simply hang, no interrupts, no nuttin'.
It turned out that I needed to re-seat the AMD Coppermine processor in its
After that, all has been OK.
Hope that helps,
Jill Rowling, System Administrator
Eng. Systems Dept, Aristocrat Technologies Australia
Level 2, 55 Mentmore Ave Rosebery NSW 2018
Phone: (02) 9697-4484 Fax: (02) 9663-1412 Email: rowling@xxxxxxxxxx
From: mkraus@xxxxxxxxxxxxxxxxxxxxxx [mailto:mkraus@xxxxxxxxxxxxxxxxxxxxxx]
Sent: Thursday, 3 April 2003 12:41
Subject: [SLUG] server crash - incorrect iptables config possible cause.
I've a Mandrake 8.2 server (2.4 kernel) with iptables. The server has had
overheating problems in the past. (Replaced the heatsink/fan unit.)
The other day it stopped responding after I'd been adjusting the firewalling
I couldn't log into the machine at all and it appeared to be running very
slowly. At the time I thought this was more overheating problems.
I replaced the server relatively quickly, and I've been diagnosing it. I
booted the machine using the installer CD witht the rescue option and
renamed rc.firewall so that the scripts it contains wouldn't be run.
When I rebooted it, I could log in fine. My question is that could an
incorrect firewall (iptables) rule been the cause of the fault?
Michael S. E. Kraus
Capital Holdings Group (NSW) Pty Ltd
p: (02) 9955 8000
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