This bug has been copied from bug #485903 and has been proposed to be backported to 5.5 z-stream (EUS).
in 2.6.18-194.6.1.el5
Technical note added. If any revisions are required, please edit the "Technical Notes" field accordingly. All revisions will be proofread by the Engineering Content Services team. New Contents: Calling the "service iptables stop" command causes the iptables init script to unload the netfilter modules. Because a clean-up code path was not taken, an endless loop occurred, which resulted in the init script becoming unresponsive. This update ensures that the clean-up code path is correctly taken, with the result that stopping the iptables service now works as expected.
An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on therefore solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHSA-2010-0504.html