watasi@LINKSTATION:~$ sudo iptables -L /lib/modules/2.4.20_mipsel_linkstation/kernel/net/ipv4/netfilter/ip_tables.o: \ /lib/modules/2.4.20_mipsel_linkstation/kernel/net/ipv4/netfilter/ip_tables.o: unresolved symbol nf_unregister_sockopt /lib/modules/2.4.20_mipsel_linkstation/kernel/net/ipv4/netfilter/ip_tables.o: \ /lib/modules/2.4.20_mipsel_linkstation/kernel/net/ipv4/netfilter/ip_tables.o: unresolved symbol nf_register_sockopt /lib/modules/2.4.20_mipsel_linkstation/kernel/net/ipv4/netfilter/ip_tables.o:\ insmod /lib/modules/2.4.20_mipsel_linkstation/kernel/net/ipv4/netfilter/ip_tables.o failed /lib/modules/2.4.20_mipsel_linkstation/kernel/net/ipv4/netfilter/ip_tables.o: insmod ip_tables failed iptables v1.3.6: can't initialize iptables table `filter': iptables who? (do you need to insmod?) Perhaps iptables or your kernel needs to be upgraded.