Subject: does IPNAT work or not?
To: None <>
From: Olli <>
List: netbsd-users
Date: 02/12/1999 19:20:06
Hi all,

I setup my NetBSD-1.3.2-box as a dialup-router. I did the following:

1. recompiled the kernel with option GATEWAY, pseudo-device ipfilter
2. installed ppp (in rc.conf -> call /etc/ppp/peers/isp) with demand
3. setup IPNAT + IPF (no entries in /etc/ipf.conf -> no firewalling)

OK - it should work. I called telnet (is from my Linux (, IP - the NetBSD-box (, IP
established a connection to my ISP via modem. But I didn't get any
response from the remote host. So I lauched up tcpdump on the
dialup-router. I'm not sure how to interpret the output:

<time><some numbers> > S328

<time><some numbers>  win 512 <mss 1460> [tos 0x10]

<time><some numbers> arp who-has tell

<time><some numbers>  arp is-at 52:54:0:de:6d:51

<time><some numbers> > S 339


<time><some numbers>  52:54:0:de:30:e > 3:0:0:0:0:1 sap f0 ui/C ln0145

< block with some numbers>

<time><some numbers> netbios-dgm > udp 201

- and so on.

I'm not sure why are called - this IP's are not given
to any computer in my network?

Has anyone an idea why I didn't get back a response to my telnet
program on my Linux-box?

thanks a lot.
with regards,