linux-kernel - Re: [PATCH v2] add stealth mode

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Date:	Tue, 07 Jul 2015 09:01:23 +0200
From:	Clemens Ladisch <clemens@...isch.de>
To:	Valdis.Kletnieks@...edu, Matteo Croce <matteo@...nwrt.org>
CC:	nicolas.dichtel@...nd.com, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] add stealth mode

Valdis.Kletnieks@...edu wrote:
> On Thu, 02 Jul 2015 10:56:01 +0200, Matteo Croce said:
>> Add option to disable any reply not related to a listening socket
>
> 2) You *do* realize that this isn't anywhere near sufficient in order
> to actually make your machine "invisible", right?  (Hint: What *other*
> packets can be sent to a machine to provoke a response?)

Even worse: if you want to pretend that the entire machine is "not there",
you must make the router in front on you reply with an ICMP "destination
unreachable" message.


Regards,
Clemens
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