From owner-freebsd-questions  Fri Aug 29 10:02:03 1997
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Date: Fri, 29 Aug 1997 12:03:56 -0500
To: Kenny Hanson <khanson@pdspc.com>
From: Shawn Leas <poker2@northernnet.com>
Subject: Re: tcpdump
Cc: questions@FreeBSD.ORG
In-Reply-To: <91DD7FDA88E4D011BED00000C0DD87E70ACA21@pds-gateway.pdspc.c
 om>
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At 10:01 AM 8/29/97 -0500, you wrote:
>TWIMC:
>	I am trying to use tcpdump to take a look at incoming/outgoing
>tcp packets.  tcpdump is complaining that /dev/bpf0 is not configured.
>I read through the bpf(4) man page but it doesn't describe how to
>create such a device.  Could somebody please share the command to
>create /dev/bpf?  Thanx in advance...

pseudodevice		bpfilter	#Berkely Packet filter

In the kernel conf.  (or something to the effect)
There's an example in LINT in that directory.