[ mike in ~ ]$ sudo lsmod |grep ipt
iptable_nat             8068  0 
iptable_mangle          3712  0 
ipt_LOG                 7040  0 
ipt_MASQUERADE          4480  0 
nf_nat                 18732  4 nf_nat_irc,nf_nat_ftp,iptable_nat,ipt_MASQUERADE
ipt_TOS                 3200  0 
ipt_REJECT              5248  0 
nf_conntrack_ipv4      17932  3 iptable_nat
nf_conntrack           56584  9 nf_nat_irc,nf_nat_ftp,iptable_nat,ipt_MASQUERADE,nf_nat,nf_conntrack_irc,nf_conntrack_ftp,nf_conntrack_ipv4,xt_state
iptable_filter          3840  1 
ip_tables              13028  3 iptable_nat,iptable_mangle,iptable_filter
x_tables               15620  8 iptable_nat,ipt_LOG,ipt_MASQUERADE,ipt_TOS,ipt_REJECT,xt_state,xt_tcpudp,ip_tables