From: "Simon Garner" <sgarner@expio.co.nz>
To: SBlaze <dagent.geo@yahoo.com>, netfilter@lists.netfilter.org
Subject: Re: a sort of n00b question here but I'ld like to know.
Date: Wed, 22 Oct 2003 10:12:19 +1300 [thread overview]
Message-ID: <00ea01c39818$162e5c80$0301a8c0@SIMON> (raw)
In-Reply-To: 20031021181138.49502.qmail@web40202.mail.yahoo.com
On Wednesday, October 22, 2003 7:11 AM [GMT+1200=NZT],
SBlaze <dagent.geo@yahoo.com> wrote:
>
> Wouldn't ntop be considered a "probing" tool?
>
I wouldn't consider it a probing tool... something like nmap would be
probing, ntop just listens. And although it puts your eth into
promiscuous mode, I wouldn't call it a packet sniffer since it won't
tell you the contents of any packets, only where they're going and how
big they are etc. I don't think you have anything to worry about.
Now I have no experience with cable or cable modems (they're practically
non-existent over here) but wouldn't running this on your linux box only
show you whatever data your cable modem is sending to you anyway...
you'd need to put the *cable modem* into promiscuous mode (or
equivalent) to actually receive any data you shouldn't.
>
> And getting back to my original reason and question for this post. How
> statistically can you see just how much iptables/netfilter is using
> of system resources?
>
I think we're agreed that the level of data you're seeing wouldn't cause
any problems CPU-wise. You can see kernel CPU usage as "system CPU%" in
top and vmstat and they're saying 0, which would be expected.
-Simon
next prev parent reply other threads:[~2003-10-21 21:12 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-10-21 0:02 a sort of n00b question here but I'ld like to know Daniel Chemko
2003-10-21 0:41 ` SBlaze
2003-10-21 1:08 ` Simon Garner
2003-10-21 1:24 ` SBlaze
2003-10-21 1:49 ` Simon Garner
2003-10-21 2:03 ` SBlaze
2003-10-21 2:33 ` Simon Garner
2003-10-21 2:49 ` SBlaze
2003-10-21 4:46 ` Alistair Tonner
2003-10-21 18:11 ` SBlaze
2003-10-21 21:12 ` Simon Garner [this message]
2003-10-21 22:36 ` SBlaze
2003-10-22 0:08 ` Alistair Tonner
2003-10-21 2:34 ` Jeffrey Laramie
2003-10-21 2:56 ` SBlaze
-- strict thread matches above, loose matches on Subject: below --
2003-10-21 19:44 Daniel Chemko
2003-10-20 23:37 Eric Marchionni
2003-10-20 1:39 SBlaze
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