Hi Group, I have one Redhat 7.1 server with kernal version 2.4. The IP table version is iptables-1.2.5-3 But is not working, when ever I tied to execute the iptables command, following is the error message that I am getting... /lib/modules/2.4.18-4smp/kernel/net/ipv4/netfilter/ip_tables.o: init_module: Device or resource busy Hint: insmod errors can be caused by incorrect module parameters, including invalid IO or IRQ parameters /lib/modules/2.4.18-4smp/kernel/net/ipv4/netfilter/ip_tables.o: insmod /lib/modules/2.4.18-4smp/kernel/net/ipv4/netfilter/ip_tables.o failed /lib/modules/2.4.18-4smp/kernel/net/ipv4/netfilter/ip_tables.o: insmod ip_tables failed iptables v1.2.5: can't initialize iptables table `filter': iptables who? (do you need to insmod?) Perhaps iptables or your kernel needs to be upgraded. How can I solve this problem... regds,