[44net] 44net connection with RaspberryPi behind NAT

Hi all, I'm new to amprnet and linux and try to get my RaspberryPi connected with the 44net. I have setup the Pi and configured IPIP tunl0. I can ping to 44.137.0.0/16. The problem is that I do not receive any RIPv2 packets with ampr-ripd or rip44d. The situation is that the Pi is behind the DMZ of my ISP router and I think that's causing the problem. Have try ed the cron as a 1 minute ping as suggested at http://n1uro.ampr.org/linuxconf/amprnat.txt but without result. Do you have any suggestions or advise on what to do to get this running? 73, Fred/PA8F