Date: Fri, 24 Jan 2003 10:07:14 -0800 From: Luigi Rizzo <rizzo@icir.org> To: Josh Brooks <user@mail.econolodgetulsa.com> Cc: freebsd-net@FreeBSD.ORG Subject: Re: catching bad ICMP errors - very odd Message-ID: <20030124100714.B14895@xorpc.icir.org> In-Reply-To: <20030124035318.O64423-100000@mail.econolodgetulsa.com>; from user@mail.econolodgetulsa.com on Fri, Jan 24, 2003 at 03:56:54AM -0800 References: <20030124035318.O64423-100000@mail.econolodgetulsa.com>
next in thread | previous in thread | raw e-mail | index | archive | help
is this with ipfw1 or ipfw2 or both ? cheers luigi On Fri, Jan 24, 2003 at 03:56:54AM -0800, Josh Brooks wrote: > > I have inserted this ipfw rule, based on guidance from the archives: > > count icmp from any to any icmptype 4,5,9,10,12,13,14,15,16,17,18 > > Now, I am watching that count rule, and it keeps growing. This means that > people are sending me packets other than types 0,3,8,11. > > So I wanted to see what they were: > > tcpdump -vvv -n | grep -v echo | grep -v unreach | grep -v exceeded > > and I let that run for hours and hours and hours - and during that time, > the counter continued to grow and grow, but my screen where I was running > tcpdump stayed blank - I never saw a single packet. > > So how is it that the counter for the above rule can grow and grow and > grow, but I never see a single ICMP message that says anything besides > "echo", "unreach" or "exceeded" ? > > thanks. > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-net" in the body of the message To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20030124100714.B14895>