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Date:      Sat, 21 Sep 1996 17:19:34 +1000 (EST)
From:      "Daniel O'Callaghan" <danny@panda.hilink.com.au>
To:        Richard Gresek <rg@plusnet.de>
Cc:        freebsd-isp@freebsd.org
Subject:   Re: IP-Header Log
Message-ID:  <Pine.BSF.3.91.960921171812.3641e-100000@panda.hilink.com.au>
In-Reply-To: <199609201208.MAA01399@gds.de>

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On Fri, 20 Sep 1996, Richard Gresek wrote:

> Is it possible to log the IP-headers taht are going through one interface?
> (Need to see the source- and the destination ip-address + the port)
> 
> We are running several FreeBSD-servers for our customers as 
> ISDN-Routers (with bisdn). The routers setup the ISDN-line once per 
> hour, even during the night.
> 
> I d like to find which workstation on which port is sending the 
> packets that cause the dialout.

Use ipfw (options IPFIREWALL) or Berkeley Packet Filter and tcpdump
(pseudo-device bpf 4)

Danny



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