From: Grant Taylor <gtaylor@riverviewtech.net>
To: Mail List - Netfilter <netfilter@vger.kernel.org>
Subject: Re: Reg Stateful firewall
Date: Wed, 28 Nov 2007 10:21:48 -0600 [thread overview]
Message-ID: <474D959C.3090702@riverviewtech.net> (raw)
In-Reply-To: <333233.67984.qm@web1009.biz.mail.sp1.yahoo.com>
On 11/28/07 09:49, Shyam Prasad wrote:
> But would it not be efficient if the firewall automatically allows
> such packets which were validated in INPUT. that would save me lot
> of rules that might otherwise be necessary.
This might be easier, but I don't know about more efficient. A single
"... -m state --state ESTABLISHED,RELATED ..." rule in the OUTPUT chain
should take care of things.
Or if you want to be a bit different about it, you could probably put
your rule(s) in a new chain and jump to said chain from both INPUT and
OUTPUT. This way, you only have to have your rules one time.
> some linux based firewalls(not netfilter) do this automatically since
> they already know the state.
Curious, what firewalls do this?
Grant. . . .
next prev parent reply other threads:[~2007-11-28 16:21 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-28 15:49 Reg Stateful firewall Shyam Prasad
2007-11-28 16:14 ` Preventing simple DoS attacks with ipt_recent on Kernel 2.6.9-42.ELsmp Shaun Mccullagh
2007-11-28 16:33 ` Grant Taylor
2007-11-28 16:21 ` Grant Taylor [this message]
-- strict thread matches above, loose matches on Subject: below --
2007-11-28 15:15 Reg Stateful firewall Shyam Prasad
2007-11-28 15:27 ` Martijn Lievaart
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