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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.
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
Fixed in the new 1.2.8-4.x version. This version has a new startup script and an additional config file. /etc/sysconfig/iptables-config: > # Additional iptables modules (nat helper) > # Default: -empty- > #IPTABLES_MODULES="ip_nat_ftp" > > # Save current firewall rules on stop. > # Value: yes|no, default: no > #IPTABLES_SAVE_ON_STOP="no" > > # Save current firewall rules on restart. > # Value: yes|no, default: no > #IPTABLES_SAVE_ON_RESTART="no" > > # Save rule counter. > # Value: yes|no, default: yes > #IPTABLES_SAVE_COUNTER="yes" > > # Numeric status output > # Value: yes|no, default: no > #IPTABLES_STATUS_NUMERIC="no" RPM packages for 7.x: http://people.redhat.com/twoerner/RPMS/7.x/iptables-1.2.8-4.73.1.i386.rpm http://people.redhat.com/twoerner/RPMS/7.x/iptables-ipv6-1.2.8-4.73.1.i386.rpm http://people.redhat.com/twoerner/SRPMS/iptables-1.2.8-4.73.1.src.rpm RPM packages for 8.0: http://people.redhat.com/twoerner/RPMS/8.0/iptables-1.2.8-4.80.1.i386.rpm http://people.redhat.com/twoerner/RPMS/8.0/iptables-ipv6-1.2.8-4.80.1.i386.rpm http://people.redhat.com/twoerner/SRPMS/iptables-1.2.8-4.80.1.src.rpm RPM packages for 9: http://people.redhat.com/twoerner/RPMS/9/iptables-1.2.8-4.90.1.i386.rpm http://people.redhat.com/twoerner/RPMS/9/iptables-ipv6-1.2.8-4.90.1.i386.rpm http://people.redhat.com/twoerner/SRPMS/iptables-1.2.8-4.90.1.src.rpm