ppp nat not working for some udp traffic

[Michael P. Soulier]

Hello,

I have a FreeBSD 5.4 box working as my gateway and PPPoE client. I'm
using the -nat option to ensure that it does nat for me, which for the
most part is working.

But, I have a client trying to tftp and that traffic isn't getting
through. We're using an odd port but it should still work.

Private side:
[root at kanga ~]# tcpdump -i sis0 -nn udp port 20001
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on sis0, link-type EN10MB (Ethernet), capture size 96 bytes
13:09:46.040334 IP 192.168.1.100.4999 > 216.191.234.113.20001: UDP, length: 39
13:09:50.040473 IP 192.168.1.100.4999 > 216.191.234.113.20001: UDP, length: 39

Public side:
[root at kanga ~]# tcpdump -i tun0 -nn udp port 20001
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on tun0, link-type NULL (BSD loopback), capture size 96 bytes
^C
0 packets captured

Any ideas?

Mike

-- 
Michael P. Soulier <msoulier at digitaltorque.ca>
"Any intelligent fool can make things bigger and more complex... It takes a
touch of genius - and a lot of courage to move in the opposite direction."
--Albert Einstein