From owner-freebsd-security Fri Apr 13 7: 3: 1 2001 Delivered-To: freebsd-security@freebsd.org Received: from gilberto.physik.rwth-aachen.de (gilberto.physik.rwth-aachen.de [137.226.30.2]) by hub.freebsd.org (Postfix) with ESMTP id 06DD837B42C for ; Fri, 13 Apr 2001 07:02:58 -0700 (PDT) (envelope-from kuku@gilberto.physik.rwth-aachen.de) Received: (from kuku@localhost) by gilberto.physik.rwth-aachen.de (8.11.1/8.9.3) id f3DE2vx32654 for freebsd-security@freebsd.org; Fri, 13 Apr 2001 16:02:57 +0200 (CEST) (envelope-from kuku) Date: Fri, 13 Apr 2001 16:02:57 +0200 (CEST) From: Christoph Kukulies Message-Id: <200104131402.f3DE2vx32654@gilberto.physik.rwth-aachen.de> To: freebsd-security@freebsd.org Subject: tcpdump (tutorial?) Sender: owner-freebsd-security@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org I don't know how others experience this: Whenever it comes to some suspicion on net intruders or so I find me in reading tcpdump's man page and I'm scratching head about the syntax. Once learned to form a little script that filters this and that it's laid away or lost when the storm is over. Next time same procedure. Uh, oh, what was again this tcpdump syntax to watch that host for incoming and outgoing packets that do not come from our local network and are not http port. Is there a tutorial? Has someone written down some typical 'security' examples? -- Chris Christoph P. U. Kukulies kuku@gil.physik.rwth-aachen.de To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message