Date: Thu, 27 Jan 2000 22:47:23 -0600 (CST) From: Ryan Thompson <freebsd@sasknow.com> To: Colin Campbell <sgcccdc@citec.qld.gov.au> Cc: freebsd-questions@freebsd.org Subject: Re: FTP: 425 Can't build data connection: operation timed out Message-ID: <Pine.BSF.4.10.10001272241220.56704-100000@sasknow.com> In-Reply-To: <Pine.LNX.4.10.10001281435360.10829-200000@guru.citec.qld.gov.au>
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On Fri, 28 Jan 2000, Colin Campbell wrote:
> Hi,
>
> I wrote this litle piece of goods cos I like "snoop". See if this tells
> you anything useful. I have to ask this, but are you sure nothing has
> changed in the ipfw setup?
Nope... Haven't rebooted in about a month (did some wiring in the office),
and, aside from the playing around I did with the routing tables today
after I discovered it broken, nothing has changed that I'm aware of. This
machine, in its current state, has previously logged many months of
uptime, without ever experiencing problems like this. I may have to give
it the old fastboot treatment after all... Hopefully my NIC isn't on the
way out, either :-)
That's an interesting script, to say the least. However, it produces
*WAY* too much output on a busy server... Even if I pipe to a file, it has
trouble keeping up. I'll see if I can modify it to look for particulars
:-)
> --------------------- cut here -------------------------------------------
> #! /usr/bin/perl
> # $Id: tcplook.pl,v 1.2 1999/10/20 06:26:09 root Exp $
> #
> use strict;
>
> open (TCPDUMP, "tcpdump -x -s 1500 -l @ARGV |") or die "$!";
>
> my $word;
> my $char;
> my $count = 0;
> while (<TCPDUMP>) {
> /^[0-9]/ and do {print "\n", $_; $count = 0; next};
> /^\s+/ and do {
> s/\s*//;
> chomp;
> printf "%8d: %-40s ", $count, $_;
> for $word (split / /) {
> for $char (split(//, pack("H4", $word))) {
> if ((ord($char) < 32) or
> (ord($char) > 126)) {
> print ".";
> }
> else {
> print $char;
> }
> }
> }
> print "\n";
> };
> $count += 16;
> }
> --------------------- cut here -------------------------------------------
>
> Just run it like you would run tcpdump.
>
> Colin
>
--
Ryan Thompson <ryan@sasknow.com> 50% Owner, Sysadmin
SaskNow Technologies http://www.sasknow.com
#106-380 3120 8th St E Saskatoon, SK S7H 0W2
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