Bug 65389 - /etc/init.d/iptables stop should rmmod iptables
/etc/init.d/iptables stop should rmmod iptables
Product: Red Hat Linux
Classification: Retired
Component: iptables (Show other bugs)
All Linux
medium Severity medium
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Assigned To: Thomas Woerner
Ben Levenson
Depends On:
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Reported: 2002-05-22 21:42 EDT by kenneth_porter
Modified: 2007-04-18 12:42 EDT (History)
0 users

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Doc Type: Bug Fix
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Last Closed: 2003-07-03 05:32:56 EDT
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RHEL 7.3 requirements from Atomic Host:
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Description kenneth_porter 2002-05-22 21:42:43 EDT
To allow iptables and ipchains initscripts to be used on the same box (eg. during a system's 
transition from firewall scripts written for kernel-2.2 systems), each initscript should rmmod 
its modules on service stop to allow the other service to load its (incompatible) modules. This 
has already been done for ipchains (see bug 63792).

Note that iptables's version may need to 
be more complicated, requiring at least a -r to remove directly dependent modules such as the 
connection tracking and NAT subsystems. There is some risk here as the current tracking modules 
may not clean up well when removed while an existing connection is being tracked. Some input from 
the netfilter people would be desirable.
Comment 1 Need Real Name 2002-05-23 02:19:03 EDT
The problem with iptables is it is made up of a bunch of modules.  So it's not
as simple as ipchains.

It would probably be better to modprobe -r iptables here rather than rmmod iptables.

Here's what I suggest it do at the end of the stop section:

/sbin/lsmod |egrep "^ipt_|^iptable|^ip_tables" | awk '{print $1}' |xargs
/sbin/modprobe -r
Comment 2 Thomas Woerner 2003-07-03 05:32:56 EDT
Fixed in the new 1.2.8-4.x version. This version has a new startup script and an
additional config file.

> # Additional iptables modules (nat helper)
> # Default: -empty-
> #IPTABLES_MODULES="ip_nat_ftp"
> # Save current firewall rules on stop.
> # Value: yes|no,  default: no
> # Save current firewall rules on restart.
> # Value: yes|no,  default: no
> # Save rule counter.
> # Value: yes|no,  default: yes
> # Numeric status output
> # Value: yes|no,  default: no

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