Kernel modules for iptables?

Dobrogo vam vremeni sutok!
Hotel postavit` firewall na iptables
Napisal pravila
i vot chto poluchil v otvet

/lib/modules/2.4.3-12/kernel/net/ipv4/netfilter/ip_tables.o: init_module: Device or resource busy
/lib/modules/2.4.3-12/kernel/net/ipv4/netfilter/ip_tables.o: insmod /lib/modules/2.4.3-12/kernel/net/ipv4/netfilter/ip_tables.o failed
/lib/modules/2.4.3-12/kernel/net/ipv4/netfilter/ip_tables.o: insmod ip_tables failed
iptables v1.2.1a: can't initialize iptables table `filter': iptables who? (do you need to insmod?)
Perhaps iptables or your kernel needs to be upgraded.

Pri prosmotre lsmod nachodit ipchains, mozhet on meshaet.
kak rukami vse ispravit`

Bol`shoe spasibo za pomosch`