On Tue, Apr 25, 2017 at 10:11 AM, Brian Kantor <Brian(a)ucsd.edu> wrote:
  These are the rules that route AMPRNet traffic to and
from the
 ipip daemon (FreeBSD ipfw syntax):
 #
 # AMPR routing
 #
 # table(1) contains all registered/routable 44net addrs.
 # table(2) contains all registered gateways.
 # outbound encapsulated packets
 # should go only to registered gateways
 00100 allow ipencap from me to 'table(2)'
 # inbound encapsulated packets
 # should only come from registered gateways
 00200 allow ipencap from 'table(2)' to me
 # filter the 44net input side of things
 # valid destination addresses go to the router socket: ipipd
 00300 divert 4444 ip from any to 'table(1)' in not dst-port
111,135-139,445,1025-1028,1900,2323,5353,7547
 # filter the 44net output side of things
 00400 allow ip from 'table(1)' to any 
Is there a default deny rule?
Tom KD7LXL