Date: Thu, 10 May 2007 13:19:18 -0600 From: "Andrew Falanga" <af300wsm@gmail.com> To: freebsd-questions <freebsd-questions@freebsd.org> Subject: Can't get the syntax correct for my tcpdump command Message-ID: <340a29540705101219xc2aa398i818c76c09f8efce8@mail.gmail.com>
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Hi, I'm about to launch this computer through the roof! This tcpdump is more finicky than feline when it comes to eating. What really bugs me is that just a couple of days ago I was doing this very same thing with no problems. For some reason, however, I just can't resurrect the memory of how the syntax goes. I want to capture only the IPv6 UDP traffic from my FreeBSD box to a host I'm trying to mount through NFS. A couple of days ago, I got it, but I had to kill that terminal session abnormally and the commands aren't in my history. So, I have something like this, tcpdump -v -s 192 -i fxp0 ip6 host remote The above works. However, when I try to modify the command to filter out only the UDP traffic, I've tried something like this: tcpdump -v -s 192 -i fxp0 ip6 udp host remote To which tcpdump complains of syntax errors. Variations I've tried are: tcpdump -v -s 192 -i fxp0 ip6 proto udp host remote tcpdump -v -s 192 -i fxp0 udp ip6 host remote All to no avail. As I said, I'm rather steamed that just two days ago I was getting what I want and today my memory won't cooperate with me. Please help! Thanks, Andy
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