q1.
#!/sbin/ipnat -f -
#
# THIS EXAMPLE IS WRITTEN FOR IP FILTER 3.3
#
# ppp0 - (external) PPP connection to ISP, address a.b.c.d/32
#
# ed0 - (internal) network interface, address w.x.y.z/32
#
# if we get a different dialup IP address each time, then we would use:
#
#map rtk0 192.168.0.0/24 -> 0/32 proxy port ftp ftp/tcp
map rtk0 192.168.0.0/24 -> 0/32 portmap tcp/udp 20000:60000
map rtk0 192.168.0.0/24 -> 0/32
rdr rtk0 0.0.0.0/0 port 1080 -> 192.168.0.10 port 1080 tcp
#rdr rtk1 0.0.0.0/0 port 80 -> 192.168.0.1 port 3128 tcp
#rdr tun0 192.168.0.1/32 port 80 -> 192.168.0.1 port 80 tcp
#rdr tun0 0.0.0.0/0 port 80 -> 192.168.0.1 port 3128 tcp



I found /etc/ipnat.conf,


I tried to locate the task and want to stop ( ps -aux).


I do not understand this NAT completed, can you help?


I understand the ISP router is 192.168.20.1

the netbsd is 192.168.0.1 and freebsd ( fileserver) 192.168.0.10

the rest of the pc is dhcp.

what happened from external, I can ftp into the fileserver while I can't ssh either servers.

The netbsd is installed with IPNAT, hylafax and imap and at the same time, it has two serial ports, I guess one is for hylafax and other one is for dial in in time of "remote administration".


The isp router is pointed by a SINGLE WAN IP only.


I know I am poor in english to need time to understand everything.

please help me!

Hello.

I've not used NetBSD before, but I've done IPNAT in freebsd.
I have written a small howto for FreeBSD NAT that may be useful for you.
http://www.darthik.com -- go to the community based howtos, then to the howto listings, and you will find my FreeBSD Router/NAT howto.

Hope this helps.

Sorry, it is hard to understand what your problem is from your post....