From: Torsten Luettgert <t.luettgert@pressestimmen.de>
To: netfilter@lists.netfilter.org
Subject: RE: A simple question
Date: Thu, 19 Aug 2004 10:39:44 +0200 [thread overview]
Message-ID: <1092904784.9327.11.camel@scaramouche> (raw)
In-Reply-To: <SERVER7QYx3G5aYY61L00000074@server7.bandwidthco.com>
On Don, 2004-08-19 at 06:18, Mark E. Donaldson wrote:
> As you might expect, it is quite easy to DOS the firewall itself
> when OUTPUT is set to DROP. And that is not a real good idea.
Please elaborate - why is it easy to DOS the firewall if the output
policy is DROP? You don't mean icmp/source-quench not getting
delivered or something?
> However, having said that, close scrutiny must be paid to what you
> allow out of the firewall and the necessary rules must be in place.
...which is why I personally use DROP as default policy for all
chains and explicitly allow everything I think necessary :-)
The only exception is in the mangle table, where I use ACCEPT
policies and just filter out the obvious spoofs, unclean frames
etc.
Greetings,
Torsten
next prev parent reply other threads:[~2004-08-19 8:39 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-08-19 2:36 A simple question Sudheer Divakaran
2004-08-19 4:18 ` Mark E. Donaldson
2004-08-19 8:39 ` Torsten Luettgert [this message]
2004-08-19 4:52 ` Dhananjoy Chowdhury
2004-08-19 15:46 ` Erick Sanz
-- strict thread matches above, loose matches on Subject: below --
2011-01-17 16:24 Ajit K Jena
2011-01-17 16:32 ` Michiel Muhlenbaumer
2005-08-10 0:11 A Simple Question Robb Bossley
2005-08-10 19:58 ` /dev/rob0
2005-08-11 5:54 ` Jan Engelhardt
2005-08-12 5:27 ` Grant Taylor
2004-08-19 17:58 A simple question Hudson Delbert J Contr 61 CS/SCBN
2004-08-19 17:47 Daniel Chemko
2004-08-19 17:14 Daniel Chemko
2004-08-19 17:31 ` Nick Drage
2004-08-19 15:15 Hudson Delbert J Contr 61 CS/SCBN
2004-08-19 11:04 Jason Opperisano
2004-04-06 2:25 Gianni Pucciani
2004-04-05 22:40 ` Antony Stone
2004-04-06 13:26 ` Gianni Pucciani
2003-07-12 15:20 Performance difference between two raid0 arrays on same drives? Gordon Henderson
2003-07-16 18:11 ` A simple question Donghui Wen
2003-06-27 8:56 A Simple question Jad Saklawi
2003-06-27 9:32 ` Glynn Clements
2003-06-27 17:57 ` chuckw
2002-08-09 1:26 A simple question ed Wang
2002-08-09 16:57 ` David Love
2001-05-07 15:29 Hai Xu
2001-05-07 15:34 ` Robert M. Love
2001-05-07 15:43 ` Feng Xian
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