netdev - Re: [PATCH v2] add stealth mode

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Date:	Tue, 7 Jul 2015 17:24:07 +0200
From:	Matteo Croce <matteo@...nwrt.org>
To:	Clemens Ladisch <clemens@...isch.de>
Cc:	Valdis Kletnieks <Valdis.Kletnieks@...edu>,
	Nicolas Dichtel <nicolas.dichtel@...nd.com>,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] add stealth mode

2015-07-07 9:01 GMT+02:00 Clemens Ladisch <clemens@...isch.de>:
> 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.

You can't do sometimes, like in DSL lines where the router in front of
you is an ISP owned DSLAM

-- 
Matteo Croce
OpenWrt Developer
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