Date: Sun, 22 Oct 2000 21:23:16 -0700 From: "Crist J . Clark" <cjclark@reflexnet.net> To: Stanley Hopcroft <Stanley.Hopcroft@IPAustralia.Gov.AU> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: tcpdump doesn't work properly (filter expressions break normal output) in 4.0, 4.1-R Message-ID: <20001022212316.F75251@149.211.6.64.reflexcom.com> In-Reply-To: <Pine.BSF.4.21.0010231503460.20386-100000@stan.aipo.gov.au>; from Stanley.Hopcroft@IPAustralia.Gov.AU on Mon, Oct 23, 2000 at 03:05:10PM %2B1100 References: <Pine.BSF.4.21.0010231457320.20386-100000@stan.aipo.gov.au> <Pine.BSF.4.21.0010231503460.20386-100000@stan.aipo.gov.au>
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On Mon, Oct 23, 2000 at 03:05:10PM +1100, Stanley Hopcroft wrote: > > On Mon, 23 Oct 2000, Stanley Hopcroft wrote: > > > Dear Ladies and Gentlemen, > > > > I am writing to say that I think there is something wrong with > > libpcap/bpf/tcpdump shipped with 4.0-RELEASE and 4.1-RELEASE. > > > > The problem is that as soon as filter expression is given to tcpdump eg > > tcpdump -x -s1500 -l port telnet, then the only packets displayed are > > those from the localhost (that running tcpdump); the replies are *not* > > shown. > > > > If the filter is removed, both client and server packets are displayed. > > I think this is a FreeBSD problem since ethereal behaves exactly the > same way (and therefore the problem is perhaps in libpcap or the bpf > code) What is your network interface? I have seen odd things from a tunN interface, but never have had trouble with Ethernet ones. -- Crist J. Clark cjclark@alum.mit.edu To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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