In message <1996...@reply.net>you write:
What can I do to 18.104.22.168 to let all the inbound our outbound
traffic from the BSD box to the provider be seen on my network?
You could enable BPF in the kernel ("pseudo-device bpfilter 16") and then use
"tcpdump -i <ppp interface>" on the FreeBSD box to monitor the traffic.