leosacc@portatile:~$ iptables -L
FATAL: Error inserting ip_tables (/lib/modules/3.5.0-27-generic/kernel/net/ipv4/netfilter/ip_tables.ko): Operation not permitted
iptables v1.4.12: can't initialize iptables table `filter': Table does not exist (do you need to insmod?)
Perhaps iptables or your kernel needs to be upgraded.