(RaspberryPi2)ubuntu@localhost:~$ free -m total used free shared buffers cached Mem: 924 143 780 12 7 100 -/+ buffers/cache: 36 888 Swap: 0 0 0 (RaspberryPi2)ubuntu@localhost:~$ lsmod Module Size Used by xt_addrtype 16384 2 xt_conntrack 16384 1 ipt_MASQUERADE 16384 1 nf_nat_masquerade_ipv4 16384 1 ipt_MASQUERADE iptable_nat 16384 1 nf_conntrack_ipv4 20480 2 nf_defrag_ipv4 16384 1 nf_conntrack_ipv4