Bug 107105 - Restarting iptables can leave modules wedged
Restarting iptables can leave modules wedged
Status: CLOSED DUPLICATE of bug 103177
Product: Red Hat Linux
Classification: Retired
Component: iptables (Show other bugs)
8.0
i686 Linux
medium Severity high
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Assigned To: Thomas Woerner
Ben Levenson
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Depends On:
Blocks:
  Show dependency treegraph
 
Reported: 2003-10-14 22:43 EDT by Need Real Name
Modified: 2007-04-18 12:58 EDT (History)
0 users

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Fixed In Version:
Doc Type: Bug Fix
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Last Closed: 2006-02-21 13:59:08 EST
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RHEL 7.3 requirements from Atomic Host:
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Description Need Real Name 2003-10-14 22:43:38 EDT
From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.0.2) Gecko/20030716

Description of problem:
The module loading change in the recent iptables errata can now break a firewall
after a simple "service iptables restart". Previously modules were not
repeatedly loaded and unloaded. Currently module unloading cannot be relied on
by production servers due to the possibility of modules wedging.

I now need to comment out the module loading/unloading from the iptables init
script to reliably restart firewalls under Red Hat Linux.

I have repeated this problem under Red Hat 7.2 and 8.0 on several different
machines. I'm sure it would also occur on 9 and any other version with the
recent iptables errata.

Version-Release number of selected component (if applicable):
iptables-1.2.8-8.80.2

How reproducible:
Sometimes

Steps to Reproduce:
1.Create a firewall that relies on conntrack (and other modules)
2.service network restart
3.Repeat

Actual Results:  The init script attempts to unload the modules and fails part
way through.

Module                  Size  Used by    Not tainted
ip_conntrack               0   0  (deleted)

This partially unloaded module will prevent conntrack loading again until the
system is rebooted.

Expected Results:  The iptables modules should not be unloaded. It is too risky.
This would prevent the conntrack (or other) modules from wedging under normal
conditions.

Additional info:
Comment 1 Need Real Name 2003-10-14 23:04:24 EDT

*** This bug has been marked as a duplicate of 103177 ***
Comment 2 Red Hat Bugzilla 2006-02-21 13:59:08 EST
Changed to 'CLOSED' state since 'RESOLVED' has been deprecated.

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