Date: Sun, 16 Dec 2001 19:24:05 -0500 (EST) From: Dru <genisis@istar.ca> To: Frederico Costa <frederico.costa@tiscali.no> Cc: <freebsd-questions@FreeBSD.ORG> Subject: Re: Question about IPFW and ICMP:8.0 Message-ID: <20011216192056.O85100-100000@x1-6-00-50-ba-de-36-33.kico1.on.home.com> In-Reply-To: <000201c1868e$5a2affd0$0301a8c0@maxi>
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On Mon, 17 Dec 2001, Frederico Costa wrote: > Hi all ... > > I have been using FreeBSD for almost 5 years, and lately because of the > several attempts to penetrate my system, I have set up ipfw to restrict > access from the outside to my network. > > Everything is working quiet well, but I am getting the following log > from ipfw several times: > > server /kernel: ipfw: 65435 Deny ICMP:8.0 213.142.81.223 64.4.13.33 out > via tun0 > > I have been able to understand most of the logs, but this one I just > understand that ICMP is trying to send something out to server > 64.4.13.33. but it is saying ICMP:8.0 > What that means ? > > And why should my server initiate connection without my knowledge ? > > Thanks in advance for any information... Hi Frederico, ICMP Type 8 Code 0 is an ICMP echo request, usually used by the Ping program. You might enjoy this article if you want to learn more about ICMP: http://www.onlamp.com/pub/a/bsd/2001/04/04/FreeBSD_Basics.html HTH, Dru To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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