IPv4
[  3]  0.0-60.0 sec  3.02 GBytes   432 Mbits/sec


IPv6
[  3]  0.0-60.0 sec  2.24 GBytes   320 Mbits/sec


IPv4 + Conntrack
[  3]  0.0-60.0 sec  1.27 GBytes   181 Mbits/sec


IPv4 + Conntrack + NAT
[  3]  0.0-60.0 sec  1.09 GBytes   156 Mbits/sec


IPv6 + Conntrack
[  3]  0.0-60.0 sec   744 MBytes   104 Mbits/sec


IPv6 + ip6tables w/o conntrack modules
[  3]  0.0-60.0 sec  1.29 GBytes   184 Mbits/sec


IPv4 + Conntrack + PPPOE
[  4]  0.0-60.1 sec  1.19 GBytes   170 Mbits/sec


IPv4 + PPPoE
[  4]  0.0-60.1 sec  2.10 GBytes   300 Mbits/sec


IPv4 + Conntrack + PPPOE + NAT
[  3]  0.0-60.0 sec  1.02 GBytes   146 Mbits/sec