Date: Sat, 24 Jun 2000 19:59:01 +0300 From: Giorgos Keramidas <keramida@ceid.upatras.gr> To: cjclark@alum.mit.edu Cc: freebsd-questions@FreeBSD.ORG Subject: Re: tcpdump(8) Strangeness Message-ID: <20000624195900.A823@hades.hell.gr> In-Reply-To: <20000623212558.G481@dialin-client.earthlink.net>; from cristjc@earthlink.net on Fri, Jun 23, 2000 at 09:25:59PM -0700 References: <20000623212558.G481@dialin-client.earthlink.net>
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On Fri, Jun 23, 2000 at 09:25:59PM -0700, Crist J. Clark wrote: > ... > However, after things acted strange I tried two commands, > > # tcpdump '! port 80' > # tcpdump 'port 80' ... > In fact, if I run, > > # tcpdump 'src port 80' > > I get complete silence. > > Does tcpdump not like tun0 or ppp? I used socket -s 80 on a virtual console, aand then I tried the following in a couple of other consoles: vty0 # tcpdump -i lo0 -n 'src port 80' vty2 # lynx http://localhost/ The output on vty0, the tcpdump console, was: 19:54:22.262329 127.0.0.1.80 > 127.0.0.1.1025: S 704709323:704709323(0) ack 704599500 win 57344 <mss 16344> (DF) 19:54:22.262978 127.0.0.1.80 > 127.0.0.1.1025: P 1:2(1) ack 1 win 57344 (DF) 19:54:22.311808 127.0.0.1.80 > 127.0.0.1.1025: . ack 262 win 57344 (DF) It works on lo0. I will try it later tonight with ppp0 and tell you if something strange happens. -- Giorgos Keramidas, < keramida @ ceid . upatras . gr > For my public key: finger keramida@ceid.upatras.gr To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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