Date: Fri, 20 Aug 2004 13:23:14 -0400 From: Barney Wolff <barney@databus.com> To: Gregory Kuhn <freebsd-net@lists.ctch.net> Cc: freebsd-net@freebsd.org Subject: Re: Traceroute Anomaly Message-ID: <20040820172314.GA73663@pit.databus.com> In-Reply-To: <6.1.2.0.2.20040820102349.02ac6440@mail.ctch.net> References: <6.1.2.0.2.20040820102349.02ac6440@mail.ctch.net>
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On Fri, Aug 20, 2004 at 11:01:31AM -0600, Gregory Kuhn wrote: > > My question is this; > Why can I do a traceroute using the DOS version of traceroute (tracert) to > any of my FreeBSD boxes, but I am not able to do so from another FreeBSD > box? Furthermore, it is not just from my own boxes that I am unable to do > a traceroute. Using the traceroutes listed at www.traceroute.org I again > am unable to trace back to my FBSD boxes. If I remember correctly, MS's tracert sends ICMP packets, while traditionally Unix traceroutes send UDP. You're blocking the UDP somewhere, presumably. tcpdump and/or adding logging to your firewall rules should tell you more. -- Barney Wolff http://www.databus.com/bwresume.pdf I'm available by contract or FT, in the NYC metro area or via the 'Net.
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