> 	1) Is there any sort of FAQ o setting up IPNAT? I'm trying to use
> some of the scripts I've seen in various posts to the list, but none have
> worked for me thus far. Here is my setup:
> 
> 	hobbes @ 10.0.0.3 # IIci running NetBSD
> 		broadcast 255.255.255.10

Why the non-standard broadcast address? It should be 10.0.0.255 by
default, given your netmask.

> 	brahms @ 10.0.0.1 # Q630 generally running MacOS (no CS ethernet
> 			  # yet under NetBSD 
> 	yoda   @ 10.0.0.2 # PB540c (no FPU, and LC040, so no NetBSD 8-()
> 	newton @ 10.0.0.4 # IIcx running MacOS (video card and ethernet
> 			  # card conflicts, so can't ifconfig.... I'll
> 			  # send some info on it later to see if someone
> 			  # can help fix)
> 
> 	* all have a 255.255.255.0 netmask
> 
> 	Hobbes has the PPP connection to the Internet, and I want to route
> those packets to at least Brahms and Yoda so I can use Netscape through
> Hobbes as a gateway. So far.... no luck. It MAY be that I need to figure
> out the domain name stuff. Right now, Hobbes is my internal DNS, and it
> also uses my ISP's DNS. What would be a good way to set up the TCP/IP
> settings on my MacOS machines.... use Hobbes as a primary DNS and my ISP
> as secondary? or vice versa?
> 	
> 	Right now, here's my nat-up script (called from /etc/ppp/ppp-up
> after I get my IP address from my ISP.
> 
> #!/bin/sh
> #
> # nat-up - setup the nat with ppp
> #
> 
> address=`ifconfig ppp0 | tail -n 1 | awk '{print $2}'`

Why do this? One of the parameters passed to the ip-up script IS
the local address of the ppp link. From man pppd:

       /etc/ppp/ip-up
              A program or script which is executed when the link
              is available for sending and receiving  IP  packets
              (that  is,  IPCP has come up).  It is executed with
              the parameters

              interface-name  tty-device  speed  local-IP-address
              remote-IP-address ipparam

              and  with  its  standard  input,  output  and error
              streams redirected to /dev/null.

              This program or script is executed  with  the  real
              and  effective  user-IDs  set  to root.  This is so
              that it can be used to manipulate routes, run priv-
              ileged  daemons  (e.g.  sendmail), etc.  Be careful
              that  the  contents  of  the   /etc/ppp/ip-up   and
              /etc/ppp/ip-down  scripts  do  not  compromise your
              system's security.

              This program or script is executed  with  an  empty
              environment,  so  you must either specify a PATH or
              use full pathnames.



> echo Current IP address is $address
> echo Cleaning out IPNAT
> ipnat -F
> ipnat -C
> ipf -E
> echo Setting up IPNAT for IP address $address
> echo "map ppp0 10.0.0.3/24 -> $address/32 portmap tcp/udp 10000:65000" |
> ipnat -f -
> # the above is one line
> echo "map ppp0 10.0.0.3/24 -> $address/32" | ipnat -f -
> 
> --------
> 	and my nat-down (called from /etc/ppp/ppp-down)
> 
> #!/bin/sh
> #
> # nat-down - bring down the nat
> #
> 
> ipf -D
> ipnat -C
> 
> -------------
> 
> 	Do I just need to adjust the IP numbers to reflect my system? Or
> is there something else going on? I've tried using 10.0.0.3 and 10.0.0.0
> for the IP/netmask pair in the map ppp0, but neither has worked. I've
> looked through the ipf ipnat and ipnat.conf man pages and they didn't seem
> to help my understanding much...

I haven't tried this yet. I probably should just to see how it goes. :-)

> 	2) What would be a good way to set up a serial connection between
> 2 NetBSD machines? I can't use ethernet between Hobbes and Brahms, but I
> could at least use a SLIP/PPP connection between the two. I read something
> about setting it up recently, but I've misplaced all of my old list mails
> 8-( Anyone care to recap? ;-) I've not had any luck so far.... 8-(

Get a printer cable, and use it to hook the two computers together. Disable
getty on both machines. Edit /etc/hosts on each one to assign an IP
address to Hobbes-ppp and Brahms-ppp. Either 10.1.0.{2,3} or something around
172.16.0.X. Basically another "internal" pair of IP addresses, which AREN'T
in the netmask of the ethernet.

Then on one (say Hobes):

pppd tty0X 38400 cdtrcts local passive Hobes-ppp:brahms-ppp

and on the other:

pppd tty0Y 38400 cdtrcts local passive

That should do it. They've changed the man page since I did this last, so my
quick example's gone. :-(

Take care,

Bill