From: Peggy Kam <ppkam@n-dsi.com>
To: netfilter@lists.netfilter.org
Subject: Re: firewall + tcpdump
Date: Tue, 30 Mar 2004 10:16:43 -0500 [thread overview]
Message-ID: <40698F5B.8060204@n-dsi.com> (raw)
In-Reply-To: <200403301537.54461.Antony@Soft-Solutions.co.uk>
As you have said that all traffic hitting the interface is seen whether
netfilter allows it or not, my question was how do I know whether the
packets being sent get blocked?
>Not sure quite what you by "in front or behind", however I can tell you that
>tcpdump works "closer to the wire" than netfilter, so it will see all traffic
>hitting the interface, whether netfilter allows it or not.
>
>
>
>>If it dumps traffic in front of a firewall, would anyone kindly suggest
>>a way to test the firewall?
>>
>>
>
>Um, test it by sending packets which should be allowed, and making sure they
>are, then sending ones which should be blocked, and making sure they are?
>
>Or have I misunderstood the question? How would you propose to use tcpdump
>to test the firewall anyway?
>
>Regards,
>
>Antony.
>
>
>
>
next prev parent reply other threads:[~2004-03-30 15:16 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-03-30 14:17 firewall + tcpdump Peggy Kam
2004-03-30 14:37 ` Antony Stone
2004-03-30 15:16 ` Peggy Kam [this message]
2004-03-30 15:25 ` DCulp
2004-03-30 15:50 ` Antony Stone
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