From: Antony Stone <Antony@Soft-Solutions.co.uk>
To: netfilter@lists.netfilter.org
Subject: Re: ethernet headers and iptables counters
Date: Mon, 10 Nov 2003 09:40:40 +0000 [thread overview]
Message-ID: <200311100940.hAA9eij16696@agate.rockstone.co.uk> (raw)
In-Reply-To: <1068455679.10203.4.camel@hohum.marcsnet.com>
On Monday 10 November 2003 9:14 am, Marc Lucke wrote:
> Hi,
>
> Do the iptables counters include layer 2 ethernet packet headers? If
> so, how much traffic is this - is it a set amount?
No, because you may not be using ethernet.
Netfilter can be used for packets across ethernet, 802.11, PPP modems - all
sorts of network transports.
Packet and byte counters in netfilter are IP (OSI layer 3) and upwards.
You can check this easily by creating a rule matching something specific (eg
ping packets), send a known amount of traffic through the box (or measure it
with a packet sniffer / protocol analyser such as ethereal, which will give
you a detailed view of the contents of the packets), and then check what the
counters say.
Antony
--
Anything that improbable is effectively impossible.
- Murray Gell-Mann, Nobel Prizewinner in Physics
Please reply to the list;
please don't CC me.
next prev parent reply other threads:[~2003-11-10 9:40 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-11-10 9:14 ethernet headers and iptables counters Marc Lucke
2003-11-10 9:40 ` Antony Stone [this message]
2003-11-10 23:21 ` Antony Stone
2003-11-10 23:34 ` Simon Kitching
2003-11-10 23:45 ` Antony Stone
2003-11-11 13:37 ` Leonardo Rodrigues Magalhães
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