Thanks. That was definitely part of the problem. I've added the following to my iptables to fix the IP Masq problem and now I can see the packets coming in correctly in tcpdump but now I seem to be having a routing problem. Could still be an iptables issue. I'll post if I can figure it out.
iptables -t nat -I PREROUTING 1 -p 50 -j ACCEPT
iptables -t nat -I POSTROUTING 1 -p 50 -j ACCEPT
mjk <email@example.com> wrote:
I think It has something to do with "IP Masquarade".Try to disable "IP masquarade".