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From: "Rob Sterenborg" <rob@sterenborg.info>
To: netfilter@lists.netfilter.org
Subject: Re: DNAT problem /  question
Date: Fri, 18 Jun 2004 18:09:43 +0200	[thread overview]
Message-ID: <003501c4554e$acf6ec10$1201a8c0@admin> (raw)
In-Reply-To: 519AD2BA94FC6E4DB5DE078B2E37CB10A76BA5@PDBEX01E.pdb.fsc.net

> $IPTABLES -A INPUT   -m state --state NEW,
> ESTABLISHED,RELATED -j ACCEPT
> $IPTABLES -A OUTPUT  -m state --state NEW,
> ESTABLISHED,RELATED -j ACCEPT
> $IPTABLES -A FORWARD -m state --state NEW,
> ESTABLISHED,RELATED -j ACCEPT

I do not think you want this. Since you don't specify protocol and/or
port, you are accepting any packet that is NEW, RELATED or ESTABLISHED.
That means any packet.
This is the same as having a policy of ACCEPT for all filter chains with
no rules to block anything. If you want to filter anything, leave the
NEW out of the rules, or just set policy to ACCEPT and skip these rules.
(Btw, do you have policy set to DROP for INPUT, OUTPUT and FORWARD so
that these rules make sense ?)


Gr,
Rob



  parent reply	other threads:[~2004-06-18 16:09 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-06-18 15:45 DNAT problem / question Arnauts, Bert
2004-06-18 16:06 ` Patrick Leslie Polzer
2004-06-18 16:14   ` Antony Stone
2004-06-18 16:06 ` Antony Stone
2004-06-18 16:45   ` Patrick Leslie Polzer
2004-06-18 16:09 ` Rob Sterenborg [this message]
2004-06-18 16:29 ` DNAT problem / question (nfcan: addressed to exclusive sender for this address) Jim Laurino
  -- strict thread matches above, loose matches on Subject: below --
2004-06-20 22:00 DNAT problem / question Arnauts, Bert
2004-06-20 22:24 Arnauts, Bert

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