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Date:      Sun, 26 Nov 2000 13:16:47 -0500 (EST)
From:      Jim Freeze <jim@freeze.org>
To:        cjclark@alum.mit.edu
Cc:        questions@FreeBSD.ORG
Subject:   Re: Need help with natd and connecting Windows to LAN
Message-ID:  <Pine.BSF.4.21.0011261307440.33771-100000@www.bellnetworks.net>
In-Reply-To: <20001125235823.F12190@149.211.6.64.reflexcom.com>

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> If you do a 'tcpdump -eni al0' while you try both the ping from the
> gateway to the Win98 box and the other way, what do you see?

Here is what I get when pinging from W98(192.168.1.2) to
FreeBSD(192.168.1.1) - W98 ping reports "Request timed out" as before:

root@eeyore1 ('tty') /usr/home/jfreeze 1 -> tcpdump -eni al0
tcpdump: listening on al0
13:15:16.269835 19:2:16:8:1:2 ff:ff:ff:ff:ff:ff 0806 60: arp who-has
192.168.1.1 tell 192.168.1.2
13:15:16.269892 ff:ff:ff:ff:ff:ff 19:2:16:8:1:2 0806 60: arp reply
192.168.1.1 is-at ff:ff:ff:ff:ff:ff
13:15:20.553363 19:2:16:8:1:2 ff:ff:ff:ff:ff:ff 0806 60: arp who-has
192.168.1.1 tell 192.168.1.2
13:15:20.553390 ff:ff:ff:ff:ff:ff 19:2:16:8:1:2 0806 60: arp reply
192.168.1.1 is-at ff:ff:ff:ff:ff:ff
13:15:25.052420 19:2:16:8:1:2 ff:ff:ff:ff:ff:ff 0806 60: arp who-has
192.168.1.1 tell 192.168.1.2
13:15:25.052442 ff:ff:ff:ff:ff:ff 19:2:16:8:1:2 0806 60: arp reply
192.168.1.1 is-at ff:ff:ff:ff:ff:ff
13:15:29.551832 19:2:16:8:1:2 ff:ff:ff:ff:ff:ff 0806 60: arp who-has
192.168.1.1 tell 192.168.1.2
13:15:29.551857 ff:ff:ff:ff:ff:ff 19:2:16:8:1:2 0806 60: arp reply
192.168.1.1 is-at ff:ff:ff:ff:ff:ff 

And the other way around
jfreeze@eeyore1 ('tty') /usr/home/jfreeze 1 -> ping rabbit
PING rabbit (192.168.1.2): 56 data bytes
ping: sendto: Permission denied
ping: sendto: Permission denied
ping: sendto: Permission denied


Oops, the firewall is up. Let me turn it to simple and ping from FBSD to
W98.

root@eeyore1 ('tty') /usr/home/jfreeze 2 -> tcpdump -eni al0
tcpdump: listening on al0
13:21:21.742700 ff:ff:ff:ff:ff:ff 19:2:16:8:1:2 0800 98: 192.168.1.1 >
192.168.1.2: icmp: echo request
13:21:22.749242 ff:ff:ff:ff:ff:ff 19:2:16:8:1:2 0800 98: 192.168.1.1 >
192.168.1.2: icmp: echo request
13:21:23.759253 ff:ff:ff:ff:ff:ff 19:2:16:8:1:2 0800 98: 192.168.1.1 >
192.168.1.2: icmp: echo request
13:21:24.769284 ff:ff:ff:ff:ff:ff 19:2:16:8:1:2 0800 98: 192.168.1.1 >
192.168.1.2: icmp: echo request
13:21:25.779287 ff:ff:ff:ff:ff:ff 19:2:16:8:1:2 0800 98: 192.168.1.1 >
192.168.1.2: icmp: echo request
13:21:26.789296 ff:ff:ff:ff:ff:ff 19:2:16:8:1:2 0800 98: 192.168.1.1 >
192.168.1.2: icmp: echo request
13:21:27.799311 ff:ff:ff:ff:ff:ff 19:2:16:8:1:2 0800 98: 192.168.1.1 >
192.168.1.2: icmp: echo request
13:21:28.809331 ff:ff:ff:ff:ff:ff 19:2:16:8:1:2 0800 98: 192.168.1.1 >
192.168.1.2: icmp: echo request
13:21:29.819347 ff:ff:ff:ff:ff:ff 19:2:16:8:1:2 0800 98: 192.168.1.1 >
192.168.1.2: icmp: echo request
...and on and on

Now ping from the pc again with the "open" firewall setting:

root@eeyore1 ('tty') /usr/home/jfreeze 3 -> tcpdump -eni al0
tcpdump: listening on al0
13:22:16.269514 19:2:16:8:1:2 ff:ff:ff:ff:ff:ff 0806 60: arp who-has
192.168.1.1 tell 192.168.1.2
13:22:16.269546 ff:ff:ff:ff:ff:ff 19:2:16:8:1:2 0806 60: arp reply
192.168.1.1 is-at ff:ff:ff:ff:ff:ff
13:22:20.488485 19:2:16:8:1:2 ff:ff:ff:ff:ff:ff 0806 60: arp who-has
192.168.1.1 tell 192.168.1.2
13:22:20.488514 ff:ff:ff:ff:ff:ff 19:2:16:8:1:2 0806 60: arp reply
192.168.1.1 is-at ff:ff:ff:ff:ff:ff
13:22:24.987795 19:2:16:8:1:2 ff:ff:ff:ff:ff:ff 0806 60: arp who-has
192.168.1.1 tell 192.168.1.2
13:22:24.987828 ff:ff:ff:ff:ff:ff 19:2:16:8:1:2 0806 60: arp reply
192.168.1.1 is-at ff:ff:ff:ff:ff:ff
13:22:29.486987 19:2:16:8:1:2 ff:ff:ff:ff:ff:ff 0806 60: arp who-has
192.168.1.1 tell 192.168.1.2
13:22:29.487017 ff:ff:ff:ff:ff:ff 19:2:16:8:1:2 0806 60: arp reply
192.168.1.1 is-at ff:ff:ff:ff:ff:ff  

On Sat, 25 Nov 2000, Crist J . Clark wrote:

> On Sun, Nov 26, 2000 at 01:06:51AM -0500, Jim Freeze wrote:
> > I am running FBSD3.4R as a gateway/router with a Win98 box connected on
> > a local LAN. The gateway machine can see the internet and the Win98 box,
> > but the Win98 box cannot ping the gateway nor see beyond it.
> 
> [snip]
> 
> The configs look OK. But...
> 
> > root@eeyore1 ('tty') ~ 17 -> ifconfig -a
> > vx0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
> >         inet 24.9.218.175 netmask 0xffffff00 broadcast 24.9.218.255
> >         ether 00:60:97:4f:aa:a0
> > al0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
> >         inet 192.168.1.1 netmask 0xffffff00 broadcast 192.168.1.255
> >         ether ff:ff:ff:ff:ff:ff
>                 ^^^^^^^^^^^^^^^^^
> This does not look at all right.
> 
> >         media: autoselect (100baseTX <full-duplex>)
> >         supported media: autoselect 100baseTX <full-duplex> 100baseTX
> > <half-duplex> 100baseTX 10baseT/UTP <full-duplex> 10baseT/UTP 10baseT/UTP
> > <half-duplex>
> > lp0: flags=8810<POINTOPOINT,SIMPLEX,MULTICAST> mtu 1500
> > tun0: flags=8010<POINTOPOINT,MULTICAST> mtu 1500
> > sl0: flags=c010<POINTOPOINT,LINK2,MULTICAST> mtu 552
> > ppp0: flags=8010<POINTOPOINT,MULTICAST> mtu 1500
> > lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
> >         inet 127.0.0.1 netmask 0xff000000
> 
> -- 
> Crist J. Clark                           cjclark@alum.mit.edu
> 
> 
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> 


===========================
Jim Freeze
jim@freeze.org
---------------------------
Am I a webmaster?
No. More like a webslave.
===========================



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