Date: Thu, 28 Nov 2002 04:16:09 +0200 From: Giorgos Keramidas <keramida@ceid.upatras.gr> To: Darren Pilgrim <dmp@pantherdragon.org> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: A program to list off packet target/source addrs as they pass? Message-ID: <20021128021609.GC31196@gothmog.gr> In-Reply-To: <3DE5794D.80003@pantherdragon.org> References: <3DE5794D.80003@pantherdragon.org>
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On 2002-11-27 18:02, Darren Pilgrim <dmp@pantherdragon.org> wrote:
> I'm in need of a program that can show me just a list of packets as
> they pass through a given interface. The only information I need
> are the transport protocol (TCP, UDP, etc) and the source and
> destination addresses and ports.
>
> I don't want to know any other information for various privacy/legal
> reasons, this is for debugging and tuning routers and firewalls.
> The idea is to run this on an interface to show what's actually
> passing through.
Use tcpdump. It's in the base system too:
gothmog# tcpdump -q -n -l -s 128 -c 10
tcpdump: listening on tun0
04:13:47.771703 212.205.244.148.50189 > 195.74.234.20.110: tcp 0 (DF)
04:13:47.930432 195.74.234.20.110 > 212.205.244.148.50189: tcp 0 (DF)
04:13:47.930510 212.205.244.148.50189 > 195.74.234.20.110: tcp 0 (DF)
04:13:48.116406 195.74.234.20.110 > 212.205.244.148.50189: tcp 92 (DF)
04:13:48.116548 212.205.244.148.50189 > 195.74.234.20.110: tcp 48 (DF)
04:13:48.284387 195.74.234.20.110 > 212.205.244.148.50189: tcp 0 (DF)
04:13:48.314383 195.74.234.20.110 > 212.205.244.148.50189: tcp 61 (DF)
04:13:48.414321 212.205.244.148.50189 > 195.74.234.20.110: tcp 0 (DF)
04:13:51.315990 212.205.244.148.50189 > 195.74.234.20.110: tcp 6 (DF)
04:13:51.477971 195.74.234.20.110 > 212.205.244.148.50189: tcp 9 (DF)
^C
26 packets received by filter
0 packets dropped by kernel
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