From: Antony Stone <Antony@Soft-Solutions.co.uk>
To: netfilter <netfilter@lists.samba.org>
Subject: Re: hi guys passive firewall
Date: Sun, 7 Jul 2002 16:21:33 +0100 [thread overview]
Message-ID: <20020707152135.EBFS16050.mta01-svc.ntlworld.com@there> (raw)
In-Reply-To: <3D285DAB.9010908@remo.ws>
On Sunday 07 July 2002 4:26 pm, Remo Mattei wrote:
> Antony Stone wrote:
> > Depends whether you're talking about putting netfilter onto the server
> > itself (in which case you filter the INPUT chain), or whether netfilter
> > is on a router between the servers and the Internet (in which case you
> > filter the FORWARD chain).
>
> So I guess since the anwser is above I just will use the forward and let
> everything pass in the input.
It sounds to me as though you are uncertain about how packets pass through a
netfilter firewall.
Packets addressed to the firewall itself go through the INPUT chain.
Packets being routed from a machine on one side of the firewall to a machine
on the other go through the FORWARD chain.
Packets originating on the firewall itself go through the OUTPUT chain.
No single packet will ever go through both the INPUT and the FORWARD chains,
or the FORWARD and the OUTPUT chains.
Antony.
prev parent reply other threads:[~2002-07-07 15:21 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-07-07 3:20 hi guys passive firewall Remo Mattei
2002-07-07 8:06 ` Antony Stone
2002-07-07 15:26 ` Remo Mattei
2002-07-07 15:21 ` Antony Stone [this message]
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