[nos-bbs] IP Chains Question

[Chris Maness]

I am trying to connect another BPQ instance that I sysop for to my
JNOS.  I am using the three IP tables rules so for and two work great:

This is so that packets outbound from JNOS have the correct source IP
address on the outside IPIP frame:

# sudo iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE

This is so that incoming AX.25/IP packets make it to JNOS:

# sudo iptables -t nat -A PREROUTING -p 93 -d 104.180.91.154 -j DNAT \
--to-destination 44.18.44.1

The AB6MV system is sysop by me and behind a firewall with port forwarding.
working between two instances of BPQ.  This rule is not picking up the
output of the target DNAT to 44.18.44.1.

# sudo iptables -t nat -A PREROUTING --dst 104.180.91.154 -p udp --dport \
10093 -j DNAT --to-destination 44.18.44.1

Here is the output from:
# sudo iptables -t nat -n -L
Chain PREROUTING (policy ACCEPT)
target     prot opt source               destination
DNAT       93   --  0.0.0.0/0            104.180.91.154       to:44.18.44.1
DNAT       udp  --  0.0.0.0/0            104.180.91.154       udp
dpt:10093 to:44.18.44.1

Chain INPUT (policy ACCEPT)
target     prot opt source               destination

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination

Chain POSTROUTING (policy ACCEPT)
target     prot opt source               destination
MASQUERADE  all  --  0.0.0.0/0            0.0.0.0/0

If you guys could look at this and see what I blew I would appreciate it.

-- 
Thanks,
Chris Maness