From: Benny Amorsen <benny+usenet@amorsen.dk>
To: Grant Taylor <gtaylor@riverviewtech.net>
Cc: Mail List - Netfilter <netfilter@vger.kernel.org>
Subject: Re: ULOG/NFLOG on a non-forwarding machine
Date: Thu, 25 Sep 2008 11:07:37 +0200 [thread overview]
Message-ID: <m3hc84mw4m.fsf@ursa.amorsen.dk> (raw)
In-Reply-To: <48D9ACB2.80502@riverviewtech.net> (Grant Taylor's message of "Tue\, 23 Sep 2008 21\:57\:54 -0500")
Grant Taylor <gtaylor@riverviewtech.net> writes:
> You /might/ be able to catch some traffic *if* the Linux TCP/IP stack
> thought that it was appropriately addressed to the system.
That is exactly the problem. The network stack doesn't think it needs
to do anything with the packets.
> I think you will have better luck doing this with bridging as bridging
> is (more) accustom to dealing with traffic that may or may not be
> addressed to the local system.
If the kernel has to forward the packet, the performance advantages of
using NFLOG probably disappear.
I guess I'm sticking to libpcap then.
/Benny
next prev parent reply other threads:[~2008-09-25 9:07 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-09-23 9:50 ULOG/NFLOG on a non-forwarding machine Benny Amorsen
2008-09-24 2:57 ` Grant Taylor
2008-09-25 9:07 ` Benny Amorsen [this message]
2008-09-25 14:05 ` Grant Taylor
2008-09-26 0:43 ` Philip Craig
2008-09-27 13:42 ` Benny Amorsen
2008-10-02 8:44 ` Покотиленко Костик
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