netmap pktgen

[Mahnaz Talebi]

Hi,

I read in "
http://typo3.change-project.eu/fileadmin/publications/Deliverables/CHANGE_Deliverable_D6_3.pdf",
that: "Packets generated
by the Netmap PktGen were always dropped by the Linux Kernel after being
processed by the
PREROUTING chain of the mangle table of Iptables."

Is it true?
Is there a way to avoid this? I want to forward netmap generated packets
via a DUT device to receiver.